original_docstring: 
          Have to check if there's anything actually running first.
  
          Returns:
              :class:`~py_trees.behaviour.Behaviour`: the child that is currently running, or None
          
docstring: Have to check if there's anything actually running first.
docstring_tokens: Have to check if there ' s anything actually running first .
code: def current_child(self):
          """
          Have to check if there's anything actually running first.
  
          Returns:
              :class:`~py_trees.behaviour.Behaviour`: the child that is currently running, or None
          """
          if self.current_index == -1:
              return None
          return self.children[self.current_index] if self.children else None
code_tokens: def current_child ( self ) : if self . current_index == - 1 : return None return self . children [ self . current_index ] if self . children else None
short_docstring: Have to check if there's anything actually running first.
short_docstring_tokens: Have to check if there ' s anything actually running first .
comment: """
          Have to check if there's anything actually running first.
  
          Returns:
              :class:`~py_trees.behaviour.Behaviour`: the child that is currently running, or None
          """