def clear_background(self, evt=None):
        self.mca2 = None
        self.plotmca(self.mca)
Read the message and forward it to the intake
dataset/ETHPy150Open xraypy/xraylarch/plugins/wx/xrfdisplay.py/XRFDisplayFrame.clear_background--crossover with--dataset/ETHPy150Open serverdensity/sd-agent/sdagent.py/ApiInputHandler.post