{"Dec": 60, "Jan": 66}
[["Dec", 60], ["Jan", 66]]
[{"month": "Dec", "commits": 60}]
For objects and CSV, name the columns with label_key and value_key. Without them the first two keys are read, in order.
label_key
value_key
Inline rows and file rows become the same objects, so a renderer never knows which it got.