no, my griddle is NOTHING like that.
I have 2, however, that could serve as a in-home substitute.
One is a Cast iron number that fits over a propane stovetop,
The other is a plug-in nonstick standard griddle good for pancakes and the occasional slider.
I also have my CI 12, but those kind of sliders need more elbow room than that.
I know I can't get quite the same effect as those guys do, but it will be kinda close.
I'll bet they soak their sliced onions in water before they throw them on the heat.