output; } public function setOutput(string $output) { $this->output = $output; } public function appendOutput(string $output) { $this->output .= $output; } public function setHeader(string $header) { $this->headers[] = $header; } public function getHeader() { } public function setContentType() { } public function getContentType() { } public function setStatusHeader() { } public function cache() { } }