class_docstr: <<< Liquid >>>
  
  The liquid chart is mainly used to highlight the percentage of data.
code: def add(
      self,
      series_name: str,
      data: types.Sequence,
      *,
      shape: str = "circle",
      color: types.Optional[types.Sequence[str]] = None,
      background_color: types.Union[str, dict, None] = None,
      is_animation: bool = True,
      is_outline_show: bool = True,
      outline_border_distance: types.Numeric = 8,
      outline_itemstyle_opts: types.ItemStyle = None,
      center: types.Sequence = None,
      tooltip_opts: types.Tooltip = None,
      label_opts: types.Label = opts.LabelOpts(
          font_size=50, position="inside"
      ),
  ):
      _animation_dur, _animation_dur_update = 2000, 1000
      if not is_animation:
          _animation_dur, _animation_dur_update = 0, 0
  
      color = color or ["#294D99", "#156ACF", "#1598ED", "#45BDFF"]
  
      self.options.get("series").append(
          {
              "type": ChartType.LIQUID,
              "name": series_name,
              "data": data,
              "waveAnimation": is_animation,
              "animationDuration": _animation_dur,
              "animationDurationUpdate": _animation_dur_update,
              "color": color,
              "shape": shape,
              "backgroundStyle": {"color": background_color},
              "outline": {
                  "show": is_outline_show,
                  "borderDistance": outline_border_distance,
                  "itemStyle": outline_itemstyle_opts,
              },
              "tooltip": tooltip_opts,
              "label": label_opts,
              "center": center,
          }
      )
      return self
  
imports: from ...None import options
  from ...None import types
  from ...charts.chart import Chart
  from ...globals import ChartType
label_desc: Use image node_id 2 for calling the Liquid obj's underlying member method code with example usage: obj.add(series_name, data) and returns: self