code: def next_sibling(self):
          
          stmts = self.parent.child_sequence(self)
          index = stmts.index(self)
          try:
              return stmts[index + 1]
          except IndexError:
              pass
docs: The next sibling statement node.
  
          :returns: The next sibling statement node.
          :rtype: NodeNG or None