Function gdk4_sys::gdk_clipboard_read_value_async

pub unsafe extern "C" fn gdk_clipboard_read_value_async(
    clipboard: *mut GdkClipboard,
    type_: GType,
    io_priority: c_int,
    cancellable: *mut GCancellable,
    callback: GAsyncReadyCallback,
    user_data: gpointer
)