docs: def _is_region_extremely_sparse(self, start, end, base_state=None):
          """
          Check whether the given memory region is extremely sparse, i.e., all bytes are the same value.
  
          :param int start: The beginning of the region.
          :param int end:   The end of the region.
          :param base_state: The base state (optional).
          :return:           True if the region is extremely sparse, False otherwise.
          :rtype:            bool
          """
  
          all_bytes = None
  
          if base_state is not None:
              all_bytes = base_state.memory.load(start, end - start + 1)
              try:
                  all_bytes = base_state.solver.eval(all_bytes, cast_to=bytes)
              except SimError:
                  all_bytes = None
  
          size = end - start + 1
  
          if all_bytes is None:
              # load from the binary
              all_bytes = self._fast_memory_load_bytes(start, size)
  
          if all_bytes is None:
              return True
  
          if len(all_bytes) < size:
              l.warning("_is_region_extremely_sparse: The given region %#x-%#x is not a continuous memory region in the "
                        "memory space. Only the first %d bytes (%#x-%#x) are processed.", start, end, len(all_bytes),
                        start, start + len(all_bytes) - 1)
  
          the_byte_value = None
          for b in all_bytes:
              if the_byte_value is None:
                  the_byte_value = b
              else:
                  if the_byte_value != b:
                      return False
  
          return True