docs: function BehaviorInterfaceError(baseBehavior, extendingBehavior, missingProps) {
  	var extendingName = extendingBehavior.behaviorName || 'anonymous behavior',
  		baseName = baseBehavior.__behaviorName || 'anonymous behavior',
  		message = 'can-connect: Extending behavior "' + extendingName + '" found base behavior "' + baseName
  			+ '" was missing required properties: ' + JSON.stringify(missingProps.related),
  		instance = new Error(message);
  
  	if (Object.setPrototypeOf){
  		Object.setPrototypeOf(instance, Object.getPrototypeOf(this));
  	}
  	return instance;
  }