    public function withHeader($header, $value)
    {
        if (!is_array($value)) {
            $value = [$value];
        }

        $value = $this->trimHeaderValues($value);
        $normalized = strtolower($header);

        $new = clone $this;
        if (isset($new->headerNames[$normalized])) {
            unset($new->headers[$new->headerNames[$normalized]]);
        }
        $new->headerNames[$normalized] = $header;
        $new->headers[$header] = $value;

        return $new;
    }
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.