Custom dependency that hides/shows a given panel on RecordView if Sales Stage is set to Closed Lost on an Opportunity

hide_panel.ext.php

<?php

/* File: ./custom/Extension/modules/Opportunities/Ext/Dependencies/hide_panel.ext.php */

$dependencies['Opportunities']['hide_panel'] = array(
	'hooks' => array("edit"),
	'trigger' => 'equal($sales_stage, "Closed Lost")',
	'triggerFields' => array('sales_stage'),
	'onload' => true,
	'actions' => array(
		array(
			'name' => 'SetPanelVisibility',
			'params' => array(
				'target' => 'panel_hidden',
				'value' => 'false' 
			)
		),
	),
	'notActions' => array(
		array(
			'name' => 'SetPanelVisibility',
			'params' => array(
				'target' => 'panel_hidden',
				'value' => 'true' 
			)
		),
	),
);