code: def retrieve(self, id) :
          
  
          _, _, lead = self.http_client.get("/leads/{id}".format(id=id))
          return lead
docs: Retrieve a single lead
  
          Returns a single lead available to the user, according to the unique lead ID provided
          If the specified lead does not exist, this query returns an error
  
          :calls: ``get /leads/{id}``
          :param int id: Unique identifier of a Lead.
          :return: Dictionary that support attriubte-style access and represent Lead resource.
          :rtype: dict