fn parse_class_method(
ion: &TokenStream,
fn: &mut ImplItemFn,
specs: &mut PrototypeSpecs,
type: &Type,
) -> Result<Option<Method>>fn parse_class_method(
ion: &TokenStream,
fn: &mut ImplItemFn,
specs: &mut PrototypeSpecs,
type: &Type,
) -> Result<Option<Method>>