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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def validate(self, obj):
 """ Raises django.core.exceptions.ValidationError if any validation error exists """


        if not isinstance(obj, self.model_class):
            raise ValidationError('Invalid object(%s) for service %s' % (type(obj), type(self)))
        LOG.debug(u'Object %s state: %s', self.model_class, obj.__dict__)
        obj.full_clean()