Very cool. One nitpick (unless the video glossed over the details) is that the double arrows in the video for "personToGreet" looks weird because it's not a basic key on the keyboard.
No problem, when you hit Ctrl+Space on the Eclipse editor it completes with a pair (opening and closing) these "chevrons"
And in other editors on non-Macs, using the US-International keyboard layout gets you guillemets (their proper name) with `AltGr-[` and `AltGr-]`. On Macs, they are `Option-\` and `Shift-Option-\` (not quite as good, but still there).