Model/Api.php
public function getBackends($version)
    {
        $url = $this->_getApiServiceUri(). 'version/'. $version. '/backend';
        $result = $this->_fetch($url, \Zend_Http_Client::GET);

        return $result;
    }
public function getBackends($version)
    {
        $url = $this->_getApiServiceUri(). 'version/'. $version. '/backend';
        $result = $this->_fetch($url, \Zend_Http_Client::GET);

        return $result;
    }
List all backends for a particular service and version.

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