How do I know if my car has an engine block heater?

• I checked the manual, which has no mention of it
• I looked for a plug near the front of my car, but didn't see it. Where would it be?
• I searched online, but didn't find a conclusive answer.

Oddly, it seems that some sites of questionable repute seem to be selling a "2010 civic engine block heater." It seems that Honda has this feature on some civics, but those are either Si or Hybrid. Mine is neither of those two.

Is there an easy way to just check and find out definitively?