public function register($errorCode, string $message)
    {
        $this->messages = array_merge($this->messages, is_array($errorCode) ? $errorCode : [
            $errorCode => $message,
        ]);
    }
public function register($errorCode, string $message)
    {
        $this->messages = array_merge($this->messages, is_array($errorCode) ? $errorCode : [
            $errorCode => $message,
        ]);
    }
public function register ( $ errorCode , string $ message ) { $ this -> messages = array_merge ( $ this -> messages , is_array ( $ errorCode ) ? $ errorCode : [ $ errorCode => $ message , ] ) ; }
Register a message mapped to an error code.

@param  mixed  $errorCode
@param  string $message
@return void
Register a message mapped to an error code .