trying yet again to make work for both streaming settings

merfish.py

@@ -19,7 +19,7 @@ class MERFISH(datasets.GeneratorBasedBuilder):
         return datasets.DatasetInfo(
             description="MERFISH dataset of mouse brain slices",
             features=datasets.Features({
-                "cell_id": datasets.Value("string"),
+                "cell_identifier": datasets.Value("string"),
                 "expression": datasets.Sequence(datasets.Value("float32")),
                 "gene_names": datasets.Sequence(datasets.Value("string")),
             }),