### Is there an existing issue for this?

- [X] I have searched the existing issues and read the documentation

### Question

Using a websocket apigatewayv2 in localstack and i need to change the body of the request e.g. add the connectionid, which is something i can do with a HTTP integration on the AWS gateway, however when I try this with localstack i receive the following error "Unsupported integration type "HTTP" for Websocket API ID" and then prints the ID of the API, if this feature is not enabled then how should we test the actual API where the connectionId and other things are added to the request body

### Anything else?

_No response_
data = str(data or "")
    return ("%s..." % data[:max_length]) if len(data) > max_length else data
def get_all_subclasses(clazz: Type) -> List[Type]:
    """Recursively get all subclasses of the given class."""
    result = set()
    subs = clazz.__subclasses__()
    for sub in subs:
        result.add(sub)
        result.update(get_all_subclasses(sub))
    return result
def fully_qualified_class_name(klass: Type) -> str:
    return f"{klass.__module__}.{klass.__name__}"
def parallelize(func: Callable, arr: List, size: int = None):
    if not size:
        size = len(arr)
    if size <= 0:
        return None
    with Pool(size) as pool:
        return pool.map(func, arr)
def isoformat_milliseconds(t) -> str: