Model/Api.php
public function dictionaryItemsList($dictionaryId)
    {
        $url = $this->_getApiServiceUri(). 'dictionary/'.$dictionaryId.'/items';
        $result = $this->_fetch($url, \Zend_Http_Client::GET);

        return $result;
    }
public function dictionaryItemsList($dictionaryId)
    {
        $url = $this->_getApiServiceUri(). 'dictionary/'.$dictionaryId.'/items';
        $result = $this->_fetch($url, \Zend_Http_Client::GET);

        return $result;
    }
Get dictionary item list

@param $dictionaryId
@return bool|mixed
@throws LocalizedException