{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"//"}]}
        // So data=20, size=1 will be "0x14", but with size=4 it'll be "0x00000014".
        // Format as hex number wide enough to fit any value of the given `size`.
        // Using a block `{self.data}` here to force a copy instead of using `self.data`