docs: def charts_slug_pollster_trendlines_tsv_get(self, slug, **kwargs):
          """
          Estimates of what the polls suggest about trends
          Derived data presented on a Pollster Chart.  The trendlines on a Pollster chart don't add up to 100: we calculate each label's trendline separately.  Use the `charts/{slug}` response's `chart.pollster_estimates[0].algorithm` to find the algorithm Pollster used to generate these estimates.  Pollster recalculates trendlines every time a new poll is entered. It also recalculates trendlines daily if they use the `bayesian-kallman` algorithm, because that algorithm's output changes depending on the end date. 
  
          This method makes a synchronous HTTP request by default. To make an
          asynchronous HTTP request, please define a `callback` function
          to be invoked when receiving the response.
          >>> def callback_function(response):
          >>>     pprint(response)
          >>>
          >>> thread = api.charts_slug_pollster_trendlines_tsv_get(slug, callback=callback_function)
  
          :param callback function: The callback function
              for asynchronous request. (optional)
          :param str slug: Unique Chart identifier. For example: `obama-job-approval` (required)
          :return: InlineResponse2002
                   If the method is called asynchronously,
                   returns the request thread.
          """
          kwargs['_return_http_data_only'] = True
          if kwargs.get('callback'):
              return self.charts_slug_pollster_trendlines_tsv_get_with_http_info(slug, **kwargs)
          else:
              (data) = self.charts_slug_pollster_trendlines_tsv_get_with_http_info(slug, **kwargs)
              return data