original_docstring: 
          This is invoked when a vertex is encountered for the first time and
          it's popped from the queue. Together with the node, we report the optimal
          distance of the node.
          
docstring: This is invoked when a vertex is encountered for the first time and
  it's popped from the queue. Together with the node, we report the optimal
  distance of the node.
docstring_tokens: This is invoked when a vertex is encountered for the first time and it ' s popped from the queue . Together with the node we report the optimal distance of the node .
code: def discover_vertex(self, v, score):
          """
          This is invoked when a vertex is encountered for the first time and
          it's popped from the queue. Together with the node, we report the optimal
          distance of the node.
          """
          return
code_tokens: def discover_vertex ( self , v , score ) : return
short_docstring: This is invoked when a vertex is encountered for the first time and
  it's popped from the queue.
short_docstring_tokens: This is invoked when a vertex is encountered for the first time and it ' s popped from the queue .
comment: """
          This is invoked when a vertex is encountered for the first time and
          it's popped from the queue. Together with the node, we report the optimal
          distance of the node.
          """