column_name example

$active_theme_label = ' — ' . __( 'Active Theme' );
                        }

                        /* In case this is a child theme, label it properly */
                        if ( $stylesheet !== $template && $item->get_stylesheet() === $stylesheet ) {
                            $active_theme_label = ' — ' . __( 'Active Child Theme' );
                        }
                    }

                    echo "<td class='theme-title column-primary{$extra_classes}'><strong>" . $item->display( 'Name' ) . $active_theme_label . '</strong>';

                    $this->column_name( $item );

                    echo '</td>';
                    break;

                case 'description':
                    echo "<td class='column-description desc{$extra_classes}'>";

                    $this->column_description( $item );

                    echo '</td>';
                    break;