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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 run(self):
 """ Iterate passed read group ids, or go through all available read groups """

        if not self._readGroupIds:
            for referenceGroupId in self.getAllReadGroups():
                self._run(referenceGroupId)
        else:
            for referenceGroupId in self._readGroupIds:
                self._run(referenceGroupId)