parameters: (self)
docstring: allow user to update trainable parameters list during training
docstring_summary: allow user to update trainable parameters list during training
docstring_tokens: allow user to update trainable parameters list during training
function: def _update_trainable(self):
          """
          allow user to update trainable parameters list during training
          """
          raise NotImplementedError
function_tokens: def _update_trainable ( self ) : raise NotImplementedError