def get_placeholder_field_names(self):
        """
        Returns a list with the names of all PlaceholderFields.
        """
        return [field.name for field in self._meta.fields if field.get_internal_type() == 'PlaceholderField']
def get_placeholder_field_names ( self ) : return [ field . name for field in self . _meta . fields if field . get_internal_type ( ) == 'PlaceholderField' ]
Returns a list with the names of all PlaceholderFields.