def getBuilderWindow():
    try:
        return QtCore.QCoreApplication.instance().builderWindow
    except AttributeError:
        return None
Converts an instance from drbd to plain.
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/gui/utils.py/getBuilderWindow--crossover with--dataset/ETHPy150Open ganeti/ganeti/lib/cmdlib/instance_set_params.py/LUInstanceSetParams._ConvertDrbdToPlain