parameters: (self, handler: ActionHandler)
docstring: Add an action handler to the pipeline before the sink.
docstring_summary: Add an action handler to the pipeline before the sink.
docstring_tokens: Add an action handler to the pipeline before the sink .
function: def add_handler(self, handler: ActionHandler) -> None:
          """Add an action handler to the pipeline before the sink."""
          self._handlers.append(handler)
function_tokens: def add_handler ( self , handler : ActionHandler ) -> None : self . _handlers . append ( handler )