Convert Magento 2 equivalent for Mage::helper

Question

I need a help to convert below code to Magento 2.

class Grid extends \Magento\Backend\Block\Widget\Grid
{
    protected function _prepareColumns() {

    $this->addColumn('entity_id', array(
            'header'    => Mage::helper('customer')->__('ID'),
            'width'     => '50px',
            'index'     => 'mageuserid',
            'type'  => 'number',
            'filter_index' => 'main_table.mageuserid'
        ));
    }
}

Specifically Mage::helper('customer')->__('ID')

Answer 1

You can simply use __('ID'). This is because Mage::helper('customer')->__('ID') used for translation only. They are equal.