{
  "source_table": "smr04_with_days",
  "transformation_type": "max",
  "grouping_column": "id",
  "absent_default_value": 0,
  "preprocess": {
    "on": [
      "id",
      "cis_marker"
    ],
    "replace_with_sum": [
      "days_in_hospital"
    ]
  },
  "aggregation_column": "days_in_hospital",
  "output_feature_name": "longest_stay"
}
