code: function _logWarn(title, stack, test = false, options = {}) {
  	if (test) {
  		return;
  	}
  
  	const { groupCollapsed, log, trace, groupEnd } = console;
  
  	if (groupCollapsed && trace && groupEnd) {
  		groupCollapsed(title);
  		log(options.id);
  		trace(stack.stack);
  		groupEnd(title);
  	} else {
  		warn(`${title}\n${stack.stack}`, test, options);
  	}
  }
docs: Logs a grouped stack trace.
  
  Fallback to warn() from @ember/debug
  
  @param  {String} title   Group title
  @param  {Object} stack   Stack trace
  @param  {Boolean} test   An optional boolean. If falsy, the warning will be displayed.
  @param  {Object} options Can be used to pass a unique `id` for this warning.
   /* istanbul ignore next