/**
  * Build API declaration
  *
  * @param $classMap
  * @return array
  */
 public function buildApi($classMap)
 {
     $apiCfg = $this->config->getApi()['declaration'];
     $api = ['url' => $apiCfg['url'], 'type' => $apiCfg['type']];
     if (isset($apiCfg['id']) && !is_null($apiCfg['id'])) {
         $api['id'] = $apiCfg['id'];
     }
     if (isset($apiCfg['namespace']) && !is_null($apiCfg['namespace'])) {
         $api['namespace'] = $apiCfg['namespace'];
     }
     if (isset($apiCfg['timeout']) && !is_null($apiCfg['timeout'])) {
         $api['timeout'] = $apiCfg['timeout'];
     }
     foreach ($classMap as $actionName => $actionProps) {
         array_walk($actionProps['methods'], function (&$method) {
             if (isset($method['resultTransformer'])) {
                 unset($method['resultTransformer']);
             }
         });
         $api['actions'][$actionName] = array_values($actionProps['methods']);
     }
     return $api;
 }