class_docstr: A node within the graph.
class_docstr_tok: ["A","node","within","the","graph","."]
code: def to_string(self):
      res = ""
      if self.properties:
          props = ",".join(
              key + ":" + str(quote_string(val))
              for key, val in sorted(self.properties.items())
          )
          res += "{" + props + "}"
  
      return res
  
imports: from ..helpers import quote_string
label_desc: Use image node_id 2 for calling the Node obj's underlying member method code with example usage: obj.to_string() and returns: res