Function gio_sys::g_file_start_mountable

pub unsafe extern "C" fn g_file_start_mountable(
    file: *mut GFile, 
    flags: GDriveStartFlags, 
    start_operation: *mut GMountOperation, 
    cancellable: *mut GCancellable, 
    callback: GAsyncReadyCallback, 
    user_data: gpointer
)