func (f *File) Open() (io.ReadCloser, error) {
	bodyOffset, err := f.findBodyOffset()
	if err != nil {
		return nil, err
	}
	if strings.HasSuffix(f.Name, "/") {
		// The ZIP specification (APPNOTE.TXT) specifies that directories, which
		// are technically zero-byte files, must not have any associated file
		// data. We previously tried failing here if f.CompressedSize64 != 0,

		// any underlying errors if possible depending on
		// their internal error types.
		switch e := err.(type) {
		case kms.Error:
			apiErr = APIError{
				Code:           e.APICode,
				Description:    e.Err,
				HTTPStatusCode: e.Code,
			}
		case batchReplicationJobError:
			apiErr = APIError{
				Description:    e.Description,
				Code:           e.Code,

    * If you have advanced custom logic to access each route's `route.response_class`, or the `router.default_response_class`, or the `app.default_response_class`: the default value for `response_class` in `APIRoute` and for `default_response_class` in `APIRouter` and `FastAPI` is now a `DefaultPlaceholder` used internally to handle and solve default values and overrides. The actual response class inside the `DefaultPlaceholder` is available at `route.response_class.value`....