code: public function setErrorCode( $errorCode ) {
  
  		$this->error = $this->config[ $errorCode ];
  
  		$this->errorCode = $errorCode;
  
  		return $this;
  
  	}
docs: Set error code in our result
  @author Mehdi Hosseini <m.hosseini@anetwork.ir>
  @since August 24, 2016
  @param $errorCode integer
  @return $this