code: def map(self, absolute_address, region_id, related_function_address=None):
          
  
          if self.is_stack:
              # Sanity check
              if not region_id.startswith('stack_'):
                  raise SimRegionMapError('Received a non-stack memory ID "%d" in a stack region map' % region_id)
  
              # Remove all stack regions that are lower than the one to add
              while True:
                  try:
                      addr = next(self._address_to_region_id.irange(maximum=absolute_address, reverse=True))
                      descriptor = self._address_to_region_id[addr]
                      # Remove this mapping
                      del self._address_to_region_id[addr]
                      # Remove this region ID from the other mapping
                      del self._region_id_to_address[descriptor.region_id]
                  except StopIteration:
                      break
  
          else:
              if absolute_address in self._address_to_region_id:
                  descriptor = self._address_to_region_id[absolute_address]
                  # Remove this mapping
                  del self._address_to_region_id[absolute_address]
                  del self._region_id_to_address[descriptor.region_id]
  
          # Add this new region mapping
          desc = RegionDescriptor(
              region_id,
              absolute_address,
              related_function_address=related_function_address
          )
  
          self._address_to_region_id[absolute_address] = desc
          self._region_id_to_address[region_id] = desc
docs: Add a mapping between an absolute address and a region ID. If this is a stack region map, all stack regions
          beyond (lower than) this newly added regions will be discarded.
  
          :param absolute_address:            An absolute memory address.
          :param region_id:                   ID of the memory region.
          :param related_function_address:    A related function address, mostly used for stack regions.