def concat(self, operand, start=0, end=0, offset=0):
        if not Gauged.map_concat(self.ptr, operand.ptr, start, end, offset):
            raise MemoryError
Concat a map. You can also optionally slice the operand map
dataset/ETHPy150Open chriso/gauged/gauged/structures/sparse_map.py/SparseMap.concat