@classmethod
    def validate_spec(cls, spec, skip=Options.skip_invalid):
        if skip: return
        options = OptionTree(items=Store.options().data.items(),
                             groups=Store.options().groups)
        return cls.apply_customizations(spec, options)
Get the Subject value of the Filter object.
dataset/ETHPy150Open ioam/holoviews/holoviews/core/options.py/StoreOptions.validate_spec--crossover with--dataset/ETHPy150Open acil-bwh/SlicerCIP/Scripted/attic/PicasaSnap/gdata/apps/emailsettings/data.py/EmailSettingsFilter.GetSubject