src/Message.php
public function get($key)
    {
        $value = '';

        if (isset($this->data[$key])) {
            $value = $this->data[$key];
        }

        return $value;
    }
public function get($key)
    {
        $value = '';

        if (isset($this->data[$key])) {
            $value = $this->data[$key];
        }

        return $value;
    }
@param string $key

@return string