Json Output enableJsonExprFinder

enableJsonExprFinder for Zend_Json::encode so you can e.g. define listeners for plugin forms
$form->setElement(
			'select',
			'mappingFilesPath',
			array(
				'label' => 'Modus',
				'required' => true,
				'store' => array(),
				'listeners' => array(
					'select' => new Zend_Json_Expr('function() { /*code*/ }')
				),
				'scope' => Shopware\Models\Config\Element::SCOPE_SHOP
			)
		);