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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 _get_goslimids_norel(self, dagslim):
 """Get all GO slim GO IDs that do not have a relationship."""

        go_slims = set()
        go2obj = self.gosubdag.go2obj
        for goid in dagslim:
            goobj = go2obj[goid]
            if not goobj.relationship:
                go_slims.add(goobj.id)
        return go_slims