class_docstr: Linked list structure with list of VectorNodes as elements.
class_docstr_tok: ["Linked","list","structure","with","list","of","VectorNodes","as","elements","."]
code: def iterate(
      self, index: int, start: tp.Optional[VectorNode] = None
  ) -> tp.Iterator[VectorNode]:
      if start is None:
          node = self.sentinel.next[index]
      else:
          node = start
      while node is not self.sentinel:
          assert node is not None
          yield node
          node = node.next[index]
  
imports: import typing
  import numpy
label_desc: Use image node_id 12 for calling the VectorLinkedList obj's underlying member method code with example usage: obj.iterate(index, start) without return types