return true if a CompNode is a Combine
return true if a CompNode is a GroupByKey
return true if a CompNode is a Load
return the node if a CompNode is a Materialise
return true if a CompNode is a ParallelDo
return true if a CompNode is a ProcessNode
return true if a CompNode is a Combine
return true if a CompNode needs to be computed
return true if a CompNode is a GroupByKey
return true if a CompNode is a Load
return true if a CompNode is a Materialise
return true if a CompNode is an Op
return true if a CompNode is a ParallelDo
return true if a CompNode is a ProcessNode
return true if a CompNode is a Return
return true if a CompNode is a Root
return true if a CompNode needs to be persisted
return true if a CompNode needs to be loaded
This functions can be used to filter or collect specific nodes in collections