Given a HoloViews Viewable return a corresponding plot instance.
        Allows supplying a document attach the plot to, useful when
        combining the bokeh model with another plot.

def get_plot(self_or_cls, obj, doc=None, renderer=None, **kwargs):
        """
        Given a HoloViews Viewable return a corresponding plot instance.
        Allows supplying a document attach the plot to, useful when
        combining the bokeh model with another plot.
        """
        if doc is None:
            doc = Document() if self_or_cls.notebook_context else curdoc()

        if self_or_cls.notebook_context:
            curdoc().theme = self_or_cls.theme
        doc.theme = self_or_cls.theme
        plot = super(BokehRenderer, self_or_cls).get_plot(obj, renderer, **kwargs)
        plot.document = doc
        return plot