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Quick Edit – Add Custom Column

function generatewp_quickedit_custom_posts_columns( $posts_columns ) {
    $posts_columns['generatewp_edit_time'] = __( 'Edit Time', 'generatewp' );
    return $posts_columns;
}
add_filter( 'manage_post_posts_columns', 'generatewp_quickedit_custom_posts_columns' );