parameters: (self)
docstring: Returns True if some choices would be output for this filter.
docstring_summary: Returns True if some choices would be output for this filter.
docstring_tokens: Returns True if some choices would be output for this filter .
function: def has_output(self):
          """
          Returns True if some choices would be output for this filter.
          """
          raise NotImplementedError
function_tokens: def has_output ( self ) : raise NotImplementedError