question: public boolean isCompositeNode ( ) { return ! parts . isEmpty ( ) || returnsOthersOutput ( ) || isRootNode ( ) ; }
target:  Returns true if this node represents a composite transform that does not perform processing of its own, but merely encapsulates a sub-pipeline (which may be empty). <p>Note that a node may be composite with no sub-transforms if it  returns its input directly extracts a component of a tuple, or other operations that occur at pipeline assembly time.