title: Naming convention for labels, functions
body: <p>I'm confused a bit and still haven't found an explicit answer: should  I name  labels as just "label1" or with underscore "_label1"? What's the most popular and recognizable way? I've even seen one with dot ".label1" if I remember correctly. </p>
  
  <p>The same  question <strong>goes for functions</strong>: "function1" or "_function1"? </p>