func ClassicContextFromContext(ctx netcontext.Context) (appengine.Context, error) {
	c := fromContext(ctx)
	if c == nil {
		return nil, errNotAppEngineContext
	}
	return c, nil
}
func ClassicContextFromContext(ctx netcontext.Context) (appengine.Context, error) {
	c := fromContext(ctx)
	if c == nil {
		return nil, errNotAppEngineContext
	}
	return c, nil
}
func ClassicContextFromContext ( ctx netcontext . Context ) ( appengine . Context , error ) { c := fromContext ( ctx ) if c == nil { return nil , errNotAppEngineContext } return c , nil }
// This is only for classic App Engine adapters.
This is only for classic App Engine adapters .