def _init_tools(self, element):
        tools = []
        for key, subplot in self.subplots.items():
            try:
                el = element.get(key)
                if el:
                    tools.extend(subplot._init_tools(el))
            except:
                pass
        return list(set(tools))
Processes the list of tools to be supplied to the plot.
dataset/ETHPy150Open ioam/holoviews/holoviews/plotting/bokeh/element.py/OverlayPlot._init_tools