Function gst_ date_ time_ new_ ym 
Source pub unsafe extern "C" fn gst_date_time_new_ym(
    year: c_int,
    month: c_int,
) -> *mut GstDateTimepub unsafe extern "C" fn gst_date_time_new_ym(
    year: c_int,
    month: c_int,
) -> *mut GstDateTime