Function ostree_sys::ostree_repo_append_gpg_signature

pub unsafe extern "C" fn ostree_repo_append_gpg_signature(
    self_: *mut OstreeRepo, 
    commit_checksum: *const c_char, 
    signature_bytes: *mut GBytes, 
    cancellable: *mut GCancellable, 
    error: *mut *mut GError
) -> gboolean