/**
  * (non-PHPdoc)
  * @see Goatherd\Process.IpcHandlerInterface::isLocked()
  */
 public function isLocked()
 {
     return $this->_handler->isLocked();
 }
 /**
  * Get entity properties.
  *
  * @return array    $properties
  */
 public function getProperties()
 {
     // TODO ipc handler might not be set
     return $this->_ipcHandler->getProperties();
 }