def get_operator(self, operator_uri):
        """Retrieves an operator by its URI.

        Args:
            operator_uri: the URI of an operator

        Returns:
            an :class:`fiftyone.operators.Operator`, or None
        """
        for operator in self.list_operators():
            if operator_uri == operator.uri:
                return operator

        return None
Retrieves an operator by its URI.

        Args:
            operator_uri: the URI of an operator

        Returns:
            an :class:`fiftyone.operators.Operator`, or None
        
fiftyone/operators/registry.py