code: def read(cls, proto):
      
      #pylint: disable=W0212
      protoCells = proto.cells
      connections = cls(len(protoCells))
  
      for cellIdx, protoCell in enumerate(protoCells):
        protoCell = protoCells[cellIdx]
        protoSegments = protoCell.segments
        connections._cells[cellIdx] = CellData()
        segments = connections._cells[cellIdx]._segments
  
        for segmentIdx, protoSegment in enumerate(protoSegments):
          segment = Segment(cellIdx, connections._nextFlatIdx,
                            connections._nextSegmentOrdinal)
  
          segments.append(segment)
          connections._segmentForFlatIdx.append(segment)
          connections._nextFlatIdx += 1
          connections._nextSegmentOrdinal += 1
  
          synapses = segment._synapses
          protoSynapses = protoSegment.synapses
  
          for synapseIdx, protoSynapse in enumerate(protoSynapses):
            presynapticCell = protoSynapse.presynapticCell
            synapse = Synapse(segment, presynapticCell, protoSynapse.permanence,
                              ordinal=connections._nextSynapseOrdinal)
            connections._nextSynapseOrdinal += 1
            synapses.add(synapse)
            connections._synapsesForPresynapticCell[presynapticCell].add(synapse)
  
            connections._numSynapses += 1
  
      #pylint: enable=W0212
      return connections
docs: Reads deserialized data from proto object
  
      :param proto: (DynamicStructBuilder) Proto object
  
      :returns: (:class:`Connections`) instance