Method demo

examples/demo.php:2099–2102

Right-click → "Go to Implementations" on GtdPrintable to jump to GtdPlainPrinter and GtdHtmlPrinter below. Try: Go-to-Implementation on "format" → format() in each implementor

(GtdPrintable $printer)

    // to jump to GtdPlainPrinter and GtdHtmlPrinter below.
    // Try: Go-to-Implementation on "format" → format() in each implementor
    public function demo(GtdPrintable $printer): string
    {
        return $printer->format();
    }
}

interface GtdPrintable { public function format(): string; }