Function uloc_getDisplayLanguage

pub unsafe fn uloc_getDisplayLanguage<P0, P1>(
    locale: P0,
    displaylocale: P1,
    language: *mut u16,
    languagecapacity: i32,
    status: *mut UErrorCode,
) -> i32
where
    P0: Param<PCSTR>,
    P1: Param<PCSTR>,