code: function collapseAll() {
          var editor = EditorManager.getFocusedEditor();
          if (editor) {
              var cm = editor._codeMirror;
              CodeMirror.commands.foldToLevel(cm);
          }
      }
docs: Collapses all foldable regions in the current document. Folding is done up to a level 'n'
  which is defined in the `maxFoldLevel` preference. Levels refer to fold heirarchies e.g., for the following
  code fragment, the function is level 1, the if statement is level 2 and the forEach is level 3
  
  function sample() {
  if (debug) {
  logMessages.forEach(function (m) {
  console.debug(m);
  });
  }
  }