src/ErrorMessageResolver.php
public function resolve($errorCode)
    {
        if (key_exists($errorCode, $this->messages)) {
            return $this->messages[$errorCode];
        }

        if ($this->translator->has($errorCode = "errors.$errorCode")) {
            return $this->translator->trans($errorCode);
        }

        return null;
    }
public function resolve($errorCode)
    {
        if (key_exists($errorCode, $this->messages)) {
            return $this->messages[$errorCode];
        }

        if ($this->translator->has($errorCode = "errors.$errorCode")) {
            return $this->translator->trans($errorCode);
        }

        return null;
    }
Resolve a message from the given error code.

@param  mixed $errorCode
@return string|null