A list of cache files created during rendering for this key,
Nil if this output did not
produce any additional resource files.
To be called by the stream node upon completion.
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.
complete has been called, or
The key in the
Issues the underlying
Output implementation to replace its
value with the new updated value.