Function nativeshell::shell::platform::flutter_sys::fl_binary_messenger_send_on_channel

pub unsafe extern "C" fn fl_binary_messenger_send_on_channel(
    messenger: *mut FlBinaryMessenger, 
    channel: *const c_char, 
    message: *mut GBytes, 
    cancellable: *mut GCancellable, 
    callback: GAsyncReadyCallback, 
    user_data: gpointer
)