def METHOD_NAME(self):
    """Run a periodic memory check in a window"""
    if not hasattr(self, 'sysInfo'):
        self.sysInfo = slicer.vtkSystemInformation()
        self.sysInfoWindow = qt.QTextBrowser()
    if self.sysInfoWindow.visible:
        return
    self.sysInfoWindow.show()
    self.memoryCallback()