Vamos comemorar juntos o seu mês.
Aproveite condições especiais.

 
<?php
class AnosList extends TPage
{
    private $form;
    private $datagrid; //para criação do da grid
    private $pageNavigation; // para se incluir a paginação
    private $loaded;
    
    public function __construct()
    {
        parent::__construct();
        $this->datagrid = new BootstrapDatagridWrapper(new TDataGrid);
        $this->datagrid->width = '100%';
        $col_id = new TDataGridColumn('id', 'Cód', 'right', '10%');
        $col_nome = new TDataGridColumn('cad_nome', 'Nome', 'left', '90%');
        /**
         * Ordenação
         **/
        $action1 = new TDataGridAction( ['Cad_AnosForm', 'onEdit'], ['key' => '{id}'] );
        $action2 = new TDataGridAction( [$this, 'onDelete'], ['key' => '{id}'] );
        $this->datagrid->addAction($action1, 'Editar', 'fa:edit blue');
        $this->datagrid->addAction($action2, 'Excluir', 'fa:trash-alt red');
        $this->datagrid->createModel();
        $this->pageNavigation = new TPageNavigation;
        $this->pageNavigation->setAction( new TAction( [$this, 'onReload'] ) );
        /*$vbox = new TVBox;
        $vbox->style = 'width:100%';
        $vbox->add($this->datagrid);
        $vbox->add($this->pageNavigation);
        */
        $panel = new TPanelGroup;
        $panel->add($this->datagrid);
        $panel->addFooter($this->pageNavigation);
        parent::add( $panel );
    }
    public function onReload($param)
    {
        
        try
        {
            TTransaction::open( 'gto_software02' );
            $repository = new TRepository('Cad_AnosCreate');
            $criteria = new TCriteria;
            $return_anos = $repository->load( $criteria );
            $this->datagrid->clear();//para garantir que a datagrid estará limpa
            if ( $return_anos )
            {
                foreach ( $return_anos as $anos )
                {
                    $this->datagrid->addItem( $anos );
                }    
            }
            $this->loaded = true;
            TTransaction::close();
        }
        catch (Exception $e)
        {
            new TMessage('error', $e->getMessage());
        }
    }
    public static function onDelete($param)
    {
    }
    function show()
    {
        if (!$this->loaded)
        {
            $this->onReload( func_get_arg(0) );
        }
        parent::show();
    }
}
?>