What is the format for the return? How do you draw it?

[ianjwhitehouse]

So, for example when I run "writeFile('Hello World!', 'qrcode.png');" what type of value does this return? How can I explain this?

[DASPRiD]

It returns void: https://github.com/Bacon/BaconQrCode/blob/master/src/BaconQrCode/Writer.php#L95