Function ostree_sys::ostree_repo_set_cache_dir

pub unsafe extern "C" fn ostree_repo_set_cache_dir(
    self_: *mut OstreeRepo, 
    dfd: c_int, 
    path: *const c_char, 
    cancellable: *mut GCancellable, 
    error: *mut *mut GError
) -> gboolean