[
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    "type": "_expression",
    "named": true,
    "subtypes": [
      {
        "type": "_primary_expression",
        "named": true
      },
      {
        "type": "binary_expression",
        "named": true
      },
      {
        "type": "concatenation",
        "named": true
      },
      {
        "type": "parenthesized_expression",
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      },
      {
        "type": "postfix_expression",
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        "type": "ternary_expression",
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      },
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      },
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        "type": "command_substitution",
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      },
      {
        "type": "compound_statement",
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        "type": "declaration_command",
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        "type": "function_definition",
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        "type": "redirected_statement",
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        "type": "subshell",
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          "type": "_primary_expression",
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          {
            "type": "_expression",
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          }
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          {
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          {
            "type": "+",
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          },
          {
            "type": "+=",
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          },
          {
            "type": "-",
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          },
          {
            "type": "-=",
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          },
          {
            "type": "<",
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          },
          {
            "type": "<=",
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          },
          {
            "type": "=",
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          },
          {
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          },
          {
            "type": "=~",
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          },
          {
            "type": ">",
            "named": false
          },
          {
            "type": ">=",
            "named": false
          },
          {
            "type": "test_operator",
            "named": true
          },
          {
            "type": "||",
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          }
        ]
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        "types": [
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            "type": "_expression",
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          },
          {
            "type": "regex",
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          }
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          {
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          }
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          }
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        "required": false,
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            "type": ";&",
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          },
          {
            "type": ";;&",
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          }
        ]
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        "required": false,
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          {
            "type": ";;",
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          }
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          },
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          }
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          }
        ]
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          "type": "file_redirect",
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        },
        {
          "type": "variable_assignment",
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        },
        {
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        },
        {
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        }
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        },
        {
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        },
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        }
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        },
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        },
        {
          "type": "concatenation",
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        },
        {
          "type": "regex",
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        },
        {
          "type": "special_variable_name",
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        },
        {
          "type": "subscript",
          "named": true
        },
        {
          "type": "variable_name",
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        }
      ]
    }
  },
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    "type": "file_redirect",
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            "type": "file_descriptor",
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          }
        ]
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            "type": "_primary_expression",
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          },
          {
            "type": "concatenation",
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          }
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    }
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          }
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            "type": "_primary_expression",
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          },
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            "type": "concatenation",
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          }
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          }
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    }
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            "type": "compound_statement",
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          },
          {
            "type": "subshell",
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          },
          {
            "type": "test_command",
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          }
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        "required": true,
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          }
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    "type": "heredoc_body",
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        {
          "type": "command_substitution",
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        },
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        },
        {
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    "type": "heredoc_redirect",
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        {
          "type": "heredoc_start",
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    "type": "herestring_redirect",
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          "type": "_primary_expression",
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        },
        {
          "type": "concatenation",
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        }
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    "type": "if_statement",
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        "required": true,
        "types": [
          {
            "type": "\n",
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          },
          {
            "type": "&",
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          },
          {
            "type": ";",
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          },
          {
            "type": ";;",
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          },
          {
            "type": "_statement",
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          }
        ]
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    },
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          "type": "_statement",
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        },
        {
          "type": "elif_clause",
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        },
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        },
        {
          "type": "heredoc_body",
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    "type": "list",
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      "required": true,
      "types": [
        {
          "type": "_statement",
          "named": true
        }
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    "type": "negated_command",
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      "types": [
        {
          "type": "command",
          "named": true
        },
        {
          "type": "subshell",
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        },
        {
          "type": "test_command",
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        }
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    "type": "parenthesized_expression",
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        }
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      "types": [
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          "type": "_statement",
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        }
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    "fields": {},
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      "required": true,
      "types": [
        {
          "type": "_expression",
          "named": true
        }
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    "type": "process_substitution",
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      "required": true,
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        },
        {
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    "type": "program",
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      "types": [
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          "named": true
        },
        {
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        }
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    "type": "redirected_statement",
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        "required": true,
        "types": [
          {
            "type": "_statement",
            "named": true
          }
        ]
      },
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          {
            "type": "file_redirect",
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          },
          {
            "type": "heredoc_redirect",
            "named": true
          },
          {
            "type": "herestring_redirect",
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          }
        ]
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    }
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    "type": "simple_expansion",
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      "types": [
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        },
        {
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      ]
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    "type": "string",
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          "type": "command_substitution",
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        {
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        },
        {
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    "type": "string_expansion",
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          "type": "raw_string",
          "named": true
        },
        {
          "type": "string",
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        }
      ]
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  {
    "type": "subscript",
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        "required": true,
        "types": [
          {
            "type": "_primary_expression",
            "named": true
          },
          {
            "type": "concatenation",
            "named": true
          }
        ]
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        "required": true,
        "types": [
          {
            "type": "variable_name",
            "named": true
          }
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    }
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  {
    "type": "subshell",
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      "required": true,
      "types": [
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          "type": "_statement",
          "named": true
        },
        {
          "type": "heredoc_body",
          "named": true
        }
      ]
    }
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  {
    "type": "ternary_expression",
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    "fields": {
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        "required": true,
        "types": [
          {
            "type": "_expression",
            "named": true
          }
        ]
      },
      "condition": {
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        "required": true,
        "types": [
          {
            "type": "_expression",
            "named": true
          }
        ]
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      "consequence": {
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        "required": true,
        "types": [
          {
            "type": "_expression",
            "named": true
          }
        ]
      }
    }
  },
  {
    "type": "test_command",
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      "multiple": false,
      "required": true,
      "types": [
        {
          "type": "_expression",
          "named": true
        }
      ]
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  },
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    "type": "unary_expression",
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    "fields": {},
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      "required": true,
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        {
          "type": "_expression",
          "named": true
        },
        {
          "type": "test_operator",
          "named": true
        }
      ]
    }
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  {
    "type": "unset_command",
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    "fields": {},
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      "required": false,
      "types": [
        {
          "type": "_primary_expression",
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        },
        {
          "type": "concatenation",
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        },
        {
          "type": "variable_name",
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        }
      ]
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    "type": "variable_assignment",
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            "type": "subscript",
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          },
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          }
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            "type": "_primary_expression",
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          },
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            "type": "array",
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          },
          {
            "type": "concatenation",
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          }
        ]
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    }
  },
  {
    "type": "while_statement",
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