To be called by the stream node upon completion.
To be called by the stream node upon completion. Signals that
the node has completed and the passed Output.Provider is ready
to receive the mkValue call.
Requests the stream control to create and memorize a file that will be written during the rendering and should be added as a resource associated with this key/reference.
The key in the FScape objects outputs dictionary.
An "untyped" output-setter reference