def get_field_deserializers(self,) -> dict[str, Callable[[ParseNode], None]]:
        """
        The deserialization information for the current model
        Returns: dict[str, Callable[[ParseNode], None]]
        """
        from ........models.attribute_definition import AttributeDefinition
        from ........models.expression_input_object import ExpressionInputObject

        from ........models.attribute_definition import AttributeDefinition
        from ........models.expression_input_object import ExpressionInputObject

        fields: dict[str, Callable[[Any], None]] = {
            "expression": lambda n : setattr(self, 'expression', n.get_str_value()),
            "targetAttributeDefinition": lambda n : setattr(self, 'target_attribute_definition', n.get_object_value(AttributeDefinition)),
            "testInputObject": lambda n : setattr(self, 'test_input_object', n.get_object_value(ExpressionInputObject)),
        }
        return fields

        The deserialization information for the current model
        Returns: dict[str, Callable[[ParseNode], None]]
        
msgraph/generated/applications/item/synchronization/templates/item/schema/parse_expression/parse_expression_post_request_body.py