{
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    {"cursor_before": 0, "cursor": 2, "read": 2, "more": true},
    {"cursor_before": 2, "cursor": 4, "read": 2, "more": false},
    {"cursor_before": 4, "cursor": 4, "read": 0, "more": false}
  ],
  "items": [
    {"item_id": "A", "value": "alpha-v2", "source_seq": 3, "deleted": 0},
    {"item_id": "B", "value": "", "source_seq": 4, "deleted": 1}
  ],
  "invalid_input": "invalid_batch_size"
}
