Function send_id_bool 

pub unsafe fn send_id_bool(
    recv: *mut c_void,
    s: *const c_void,
    a: *mut c_void,
    b: bool,
) -> bool

Send a message with a specific, non-variadic signature.

Safety

recv must be a live Objective-C object that responds to s, and the declared argument and return types must match that selector’s. Nothing here checks either.