code: def _get_opts_seaborn(self, opts, style):
          
          if opts is None:
              if self.chart_opts is None:
                  opts = {}
              else:
                  opts = self.chart_opts
          if style is None:
              if self.chart_style is None:
                  style = self.chart_style
              else:
                  style = {}
          return opts, style
docs: Initialialize for chart rendering