code: def leaves(self):
          
          leaves = []
  
          for c in self:
              if not c.nodes and c.type == "con" and c.parent.type != "dockarea":
                  leaves.append(c)
  
          return leaves
docs: Retrieve a list of windows that delineate from the currently
          selected container.  Only lists client windows, no intermediate
          containers.
  
          :rtype: List of :class:`Con`.