original_docstring: 
          Recursive function to extract the last running node of the tree.
  
          Returns:
              :class::`~py_trees.behaviour.Behaviour`: the tip function of the current child of this composite or None
          
docstring: Recursive function to extract the last running node of the tree.
docstring_tokens: Recursive function to extract the last running node of the tree .
code: def tip(self):
          """
          Recursive function to extract the last running node of the tree.
  
          Returns:
              :class::`~py_trees.behaviour.Behaviour`: the tip function of the current child of this composite or None
          """
          return self.current_child.tip() if self.current_child is not None else None
code_tokens: def tip ( self ) : return self . current_child . tip ( ) if self . current_child is not None else None
short_docstring: Recursive function to extract the last running node of the tree.
short_docstring_tokens: Recursive function to extract the last running node of the tree .
comment: """
          Recursive function to extract the last running node of the tree.
  
          Returns:
              :class::`~py_trees.behaviour.Behaviour`: the tip function of the current child of this composite or None
          """