code: public function map($mapping, array $config = array()) {
          if (is_array($mapping)) $mapping = new Mapping($mapping);
          $mapping->config($config);
  
          try {
              $type = $mapping->config('type');
          }
          catch (\Exception $e) {} // No type is cool
          if (isset($type) && !$this->passesTypeConstraint($type)) {
              throw new Exception("Cant create mapping due to type constraint mismatch");
          }
  
          return $this->request('_mapping', 'PUT', $mapping->export(), true);
      }
docs: Puts a mapping on index
  
  @param array|object $mapping
  @param array $config
  @throws Exception
  @return array