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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 lookup_field_orderable(self, field):
 """ Returns whether the passed in field is sortable or not, by default all 'raw' fields, that is fields that are part of the model are sortable. """

        try:
            self.model._meta.get_field_by_name(field)
            return True
        except Exception:
            # that field doesn't exist, so not sortable
            return False