src/Response/Response.php
public function setStatusCode(int $value = null)
    {
        if (is_null($value)) {
            return $this;
        }

        $this->statusCode = $value;
        return $this;
    }
public function setStatusCode(int $value = null)
    {
        if (is_null($value)) {
            return $this;
        }

        $this->statusCode = $value;
        return $this;
    }
Set status code to be sent as part of headers.

@param int $value of response status code

@return self