Function gst::ffi::g_cclosure_marshal_generic_va

pub unsafe extern "C" fn g_cclosure_marshal_generic_va(
    closure: *mut GClosure, 
    return_value: *mut GValue, 
    instance: gpointer, 
    args_list: va_list, 
    marshal_data: gpointer, 
    n_params: c_int, 
    param_types: *mut GType
)