1[ 2 cirq.MeasurementKey(name="key"), 3 cirq.MeasurementKey(path=('outer',), name='key'), 4 cirq.MeasurementKey(path=('nested', 'path'), name='key'), 5] 6
1[ 2 cirq.MeasurementKey(name="key"), 3 cirq.MeasurementKey(path=('outer',), name='key'), 4 cirq.MeasurementKey(path=('nested', 'path'), name='key'), 5] 6