code: def destroySegment(self, segment):
      
      # Remove the synapses from all data structures outside this Segment.
      for synapse in segment._synapses:
        self._removeSynapseFromPresynapticMap(synapse)
      self._numSynapses -= len(segment._synapses)
  
      # Remove the segment from the cell's list.
      segments = self._cells[segment.cell]._segments
      i = segments.index(segment)
      del segments[i]
  
      # Free the flatIdx and remove the final reference so the Segment can be
      # garbage-collected.
      self._freeFlatIdxs.append(segment.flatIdx)
      self._segmentForFlatIdx[segment.flatIdx] = None
docs: Destroys a segment.
  
      :param segment: (:class:`Segment`) representing the segment to be destroyed.