code: def __init__(
      self, plotly_name="textfont", parent_name="heatmap", **kwargs
  ):
      super(TextfontValidator, self).__init__(
          plotly_name=plotly_name,
          parent_name=parent_name,
          data_class_str=kwargs.pop("data_class_str", "Textfont"),
          data_docs=kwargs.pop(
              "data_docs",
              """
              color
  
              family
                  HTML font family - the typeface that will be
                  applied by the web browser. The web browser
                  will only be able to apply a font if it is
                  available on the system which it operates.
                  Provide multiple font families, separated by
                  commas, to indicate the preference in which to
                  apply fonts if they aren't available on the
                  system. The Chart Studio Cloud (at
                  https://chart-studio.plotly.com or on-premise)
                  generates images on a server, where only a
                  select number of fonts are installed and
                  supported. These include "Arial", "Balto",
                  "Courier New", "Droid Sans",, "Droid Serif",
                  "Droid Sans Mono", "Gravitas One", "Old
                  Standard TT", "Open Sans", "Overpass", "PT Sans
                  Narrow", "Raleway", "Times New Roman".
              size
  
  """,
          ),
          **kwargs,
      )
  
imports: import _plotly_utils.basevalidators
label_desc: Use image node_id 1 to create a new TextfontValidator object from inherited base classes: _plotly_utils.basevalidators with example: obj = TextfontValidator(plotly_name, parent_name)