Function get_reftype 

pub unsafe extern "C" fn get_reftype(
    q: *const c_char,
    refnum: c_long,
    progname: *mut c_char,
    all: *mut variants,
    nall: c_int,
    tag: *mut c_char,
    is_default: *mut c_int,
    chattiness: c_int,
) -> c_int