How to use the numcodecs.JSON function in numcodecs

def test_json_object_array(self):
        for chunks in [1, 2, 5, 10, 100]:
            n = 10
            z = zarr.empty(
                n, dtype=object, object_codec=numcodecs.JSON(), chunks=(chunks,)
            )
            for j in range(n):
                z[j] = {str(k): k for k in range(j)}
            self.filter_warnings_verify_round_trip({"z": z})

def test_empty_string_list(self):
        z = zarr.empty(1, dtype=object, object_codec=numcodecs.JSON(), chunks=(2,))
        z[0] = ["", ""]
        self.filter_warnings_verify_round_trip({"z": z})

def __init__(
        self,
        path=None,
        num_flush_threads=0,
        compressor=DEFAULT_COMPRESSOR,
        chunk_size=1024,
        max_file_size=None,
    ):
        self._mode = self.BUILD_MODE
        self._num_flush_threads = num_flush_threads
        self._chunk_size = max(1, chunk_size)
        self._metadata_codec = numcodecs.JSON()
        self._compressor = compressor
        self.data = zarr.group()
        self.path = path
        if path is not None:
            store = self._new_lmdb_store(max_file_size)
            self.data = zarr.open_group(store=store, mode="w")
        self.data.attrs[FORMAT_NAME_KEY] = self.FORMAT_NAME
        self.data.attrs[FORMAT_VERSION_KEY] = self.FORMAT_VERSION
        self.data.attrs["uuid"] = str(uuid.uuid4())

        chunks = self._chunk_size
        provenances_group = self.data.create_group("provenances")
        provenances_group.create_dataset(
            "timestamp",
            shape=(0,),
            chunks=chunks,