text: import _plotly_utils.basevalidators
  
  
  class LegendgrouptitleValidator(_plotly_utils.basevalidators.CompoundValidator):
      def __init__(
          self, plotly_name="legendgrouptitle", parent_name="streamtube", **kwargs
      ):
          super(LegendgrouptitleValidator, self).__init__(
              plotly_name=plotly_name,
              parent_name=parent_name,
              data_class_str=kwargs.pop("data_class_str", "Legendgrouptitle"),
              data_docs=kwargs.pop(
                  "data_docs",
                  """
              font
                  Sets this legend group's title font.
              text
                  Sets the title of the legend group.
  """,
              ),
              **kwargs,
          )
  