The Conditional pipeline stage allows another pipeline stage to be applied if the RSS item matches the given condition.
The options for the Conditional stage are:
condition
The condition that each RSS item must match for the other pipeline stage to be applied. This can either be a full Filter object or a single Rule object, both of which are described here.
stage
A string containing the module name of the pipeline stage that should be applied if the condition matches an RSS item.
opts
An object containing the options to provide to the other pipeline stage.