Extract input and output type annotations from a start method.
| Returns |
A tuple of (input_type, output_type)
where
|
- None means the type annotation is missing or could not be extracted.
This is valid when a service definition provides the types.
- type(None) (NoneType) means the annotation explicitly specified None
as the type (e.g., input: None or -> None).
When None is returned for either type, the caller should handle it based on
whether a service definition is available:
- If a service definition is provided, the types from the service definition
will be used and type validation against the handler is skipped.
- If no service definition is provided, an error will be raised downstream
when attempting to create an OperationDefinition.
|