public function hasHelper($helperType)
    {
        if ($this->isValidKey($helperType)) {
            if (!is_null($formHelperMap = $this->getHelperMap()->get($helperType))
                && count($formHelperMap) > 0
            ) {
                return true;
            }
        } else {
            throw new InvalidArgumentException('Invalid form helper type given');
        }
        return false;
    }
public function hasHelper($helperType)
    {
        if ($this->isValidKey($helperType)) {
            if (!is_null($formHelperMap = $this->getHelperMap()->get($helperType))
                && count($formHelperMap) > 0
            ) {
                return true;
            }
        } else {
            throw new InvalidArgumentException('Invalid form helper type given');
        }
        return false;
    }
public function hasHelper ( $ helperType ) { if ( $ this -> isValidKey ( $ helperType ) ) { if ( ! is_null ( $ formHelperMap = $ this -> getHelperMap ( ) -> get ( $ helperType ) ) && count ( $ formHelperMap ) > 0 ) { return true ; } } else { throw new InvalidArgumentException ( 'Invalid form helper type given' ) ; } return false ; }
return if helper are registered

@param       string      $helperType         helper type eg. tag, option, field, choise
@return      bool

@throws  InvalidArgumentException
return if helper are registered