def is_includable ( self ):
        return (self.id != '')

    #---------------------------------------------------------------------------
    #  Replaces any items which have an 'id' with an Include object with the
    #  same 'id', and puts the object with the 'id' into the specified
    #  ViewElements object:
    #---------------------------------------------------------------------------
The actual logic of the command. Subclasses must implement
dataset/ETHPy150Open enthought/traitsui/traitsui/group.py/Group.is_includable--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/core/management/base.py/BaseCommand.handle