Template_Tag_Handler::validate_tag_data( array $data )

	private function validate_tag_data( $data ) {
		if ( ! is_array( $data ) ) {
			/* translators: 1: template tag slug, 2: template tag handler slug */
			throw new InvalidArgumentException( sprintf( __( 'Invalid template tag %1$s for handler %2$s.', 'torro-forms' ), $slug, $this->slug ) );
		}

		if ( empty( $data['label'] ) || empty( $data['callback'] ) ) {
			/* translators: 1: template tag slug, 2: template tag handler slug */
			throw new InvalidArgumentException( sprintf( __( 'Invalid template tag %1$s for handler %2$s.', 'torro-forms' ), $slug, $this->slug ) );
		}

		if ( ! isset( $data['description'] ) ) {
			$data['description'] = '';
		}

		if ( ! isset( $data['group'] ) ) {
			$data['group'] = 'default';
		}

		return $data;
	}