Crumbs:
  foo()
  OuterLoop@ for(i in 1..10)
  for(j in 1..10)
  Label1@ Label2@ while (true)
  DoWhile@ do … while (x)
Tooltips:
  function <b><code>foo()</code></b>
  OuterLoop@ for(i in 1..10)
  for(j in 1..10)
  Label1@ Label2@ while (true)
  DoWhile@ do … while (x)