Magento simple Hello World extension: Template helpers

Hello.php

/**
 * Magento simple Hello World extension: Template helpers
 *
 * Helper classes for the template
 * provided for documentation purposes in the
 * Magento 1.x Extension Developer's Guide
 * 
 * @copyright Copyright (c) 2014 eBay Inc. (http://www.magentocommerce.com)
 */

<?php
class Tutorials_Hello_Block_Hello extends Mage_Core_Block_Template {

    public function _prepareLayout()
    {
        $this->getLayout()->getBlock('breadcrumbs')
            ->addCrumb('home',
                array('label'=>Mage::helper('catalogsearch')->__('Home'),
                    'title'=>Mage::helper('catalogsearch')->__('Go to Home Page'),
                    'link'=>Mage::getBaseUrl())
            )
            ->addCrumb('customer',
                array('label'=>Mage::helper('customer')->__('Hello'))
            );
        return parent::_prepareLayout();
    }

    public function getHello()
    {
        echo $this->__('Hello World');
    }

}