/**
 * Show or hide levels which don't allow signups by default.
 *
 * @see pmpro_membership_content_filter
 *
 * @param bool  $show_disallowed              default: false
 * @param array $post_membership_levels_ids   Array of level IDs.
 * @param array $post_membership_levels_names Array of level names.
 *
 * @return bool Whether to show levels with no sign-up (default: false).
 */
apply_filters( 'pmpro_membership_content_filter_disallowed_levels', false, $post_membership_levels_ids, $post_membership_levels_names );