src/Tomahawk/Validation/Validator.php
public function addMessage($field, Message $message)
    {
        if (!isset($this->messages[$field])) {
            $this->messages[$field] = [];
        }

        $this->messages[$field][] = $message;
        return $this;
    }
public function addMessage($field, Message $message)
    {
        if (!isset($this->messages[$field])) {
            $this->messages[$field] = [];
        }

        $this->messages[$field][] = $message;
        return $this;
    }
Add message

@param $field
@param Message $message
@return $this