CakePHP 3.0 beta 1: Please help to use Html helper in function on view

Dear all.

This so stupid but please help me.

In my cell: app/src/View/Cell/MyCell.php

i'm use public $helpers = ['Html'];

In my cell view: app/src/Template/Cell/MyCell/display.ctp

<?php
$this->Html->link('name', ['controller' => 'mycontroller', 'action' => 'myaction', 'param']); // This one work correctly
function generateLink($name) {
   return $this->Html->link($name, ['controller' => 'mycontroller', 'action' => 'myaction', 'param']); // This one cannot work then        output error: Using $this when not in object context
}

echo generateLink('MyLinkName');
?>

Please guide me how to use $this inside view function.

Thanks.

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