Macro ruva_core::init_event_handler

macro_rules! init_event_handler {
    (
		R: $response:ty,
		E: $error:ty $(,)?
        {
			$(
				$event:ty: [$($handler:expr $(=>($($injectable:ident $(( $($arg:ident),* ))? ),*))?),* $(,)? ]
			),*
			$(,)?
		}
    ) => { ... };
    (
		E: $error:ty,
		R: $response:ty $(,)?
		{
			$(
				$event:ty: [$($handler:expr $(=>($($injectable:ident $(( $($arg:ident),* ))? ),*))?),* $(,)? ]
			),*
			$(,)?
		}
	) => { ... };
}

init_event_handler creating macro Not that crate must have Dependency struct with its own implementation