def json(self, *args, **kwargs):
        """Create a json string representation of this app."""
        # Need custom jsonification here because it is likely the model
        # structure contains loops.

        return json_utils.json_str_of_obj(
            self, *args, instrument=self.instrument, **kwargs
        )
Create a json string representation of this app.
src/core/trulens/core/app.py