title: Magento - how to Locate physically a specific class in Magento 1.7.2
body: <p>Does anybody know how can I locate the physical path of a class in Magento?</p>
  
  <p>For example this class: <strong>Idev_OneStepCheckout_Block_Adminhtml_Sales_Order_View_Comment</strong></p>
  
  <p>Seems that it follows a pattern of folders - but its not always the case.</p>
  
  <p><strong>Can you give me an idea how to locate this class ?</strong></p>