title: What does this icon in Eclipse mean?
body: <p>I am referring specifically to the green plus sign in the screenshot below.</p>
  
  <p>[edit] This is taken from "Outline" view, and I am coding in Java. </p>
  
  <p><img src="https://i.stack.imgur.com/SyDGl.png" alt="Screenshot of Eclipse icon, green plus sign"></p>