$this->priority,
				is_callable( $this->callback_args ) ? ( $this->callback_args )() : $this->callback_args
			);

		}

	}

	/**
	 * Save field data.
	 *
	 * Loops through fields and saves the data to postmeta.
	 *
	 * Called by $this->save_actions().
	 *
	 * This function is dumb. If the fields need to output error messages or do validation override
	 * this method and create a custom save method to accommodate the validations or conditions.
	 *
	 * @since 3.0.0
	 * @since 3.14.1 Unknown.
	 * @since 3.35.0 Added nonce verification before processing data; only access `$_POST` data via `llms_filter_input()`.
	 * @since 3.36.0 Allow quotes when sanitizing some special fields that store a shortcode.
	 * @since 3.36.1 Check metabox capability during saves.
	 *               Return an `int` depending on return condition.
	 *               Automatically add `FILTER_REQUIRE_ARRAY` flag when sanitizing a `multi` field.
	 * @since 3.37.12 Move field sanitization and updates to the `save_field()` method.
	 * @since 6.0.0 Allow skipping the saving of a field.
	 *
	 * @param int $post_id WP Post ID of the post being saved.
	 * @return int `-1` When no user or user is missing required capabilities or when there's no or invalid nonce.
	 *             `0` during inline saves or ajax requests or when no fields are found for the metabox.
	 *             `1` if fields were found. This doesn't mean there weren't errors during saving.
	 */
	protected function save( $post_id ) {

		if ( ! llms_verify_nonce( 'lifterlms_meta_nonce', 'lifterlms_save_data' ) || ! current_user_can( $this->capability, $post_id ) ) {
			return -1;
		}