What is the code tap in Apex?

Excuse me, I was wondering if you could clarify something for me. I've come across the term "code tap" in the context of Apex, but I'm not entirely sure what it refers to. Could you possibly provide a brief explanation of what it means? I'm particularly interested in how it's used and what its significance is in the world of Apex or in cryptocurrency and finance in general. Your insight would be greatly appreciated.