Contains one property: sourceNode. Returns true for Composite types (Segments, Rows, RecordGroups, Records) if sourceNode is not present in the file.
When used with a simple type (String, DateTime, Element, and Field), this Actions check the contents for the sourceNode. Returns true if the property is null or only contains white spaces. While this may be used with any type of node or variable, it is only useful for simple types.
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