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<?php

/**
 * Class TNW_Salesforce_Model_Observer
 */
class TNW_Salesforce_Model_Observer
{
 
    public function leadSendBefore(Varien_Event_Observer $observer) {
		/**
		 * Array of Salesforce objects
		 * @var stdClass[] $_data
		 */
		$_data = $observer->getData('data');

		// Your custom code
    }
 
}