getOutputFileName
Returns the output file name for the subdocument, based on the context's options. If the pipeline enforces minimal subdocument collisions (com.quarkdown.core.pipeline.PipelineOptions.minimizeSubdocumentCollisions), Subdocument.uniqueName is returned, otherwise just Subdocument.name, which is more human-readable but prone to collisions.
Return
the output file name for the subdocument
Parameters
context
the context that holds the pipeline options