Function libsolv_sys::ffi::repowriter_set_keyfilter

pub unsafe extern "C" fn repowriter_set_keyfilter(
    writer: *mut Repowriter, 
    keyfilter: Option<unsafe extern "C" fn(repo: *mut Repo, key: *mut Repokey, kfdata: *mut c_void) -> c_int>, 
    kfdata: *mut c_void
)