{
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    "hierarchy_population": "first_order",
    "input_mode": "external_synaptic_drive",
    "membership_file": "/data/digital-drosophila/experiments/phase4d-io/visual-adapter/engineering-first-order.parquet"
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    "hierarchy_population": "second_order",
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    "membership_file": "/data/digital-drosophila/experiments/phase4d-io/visual-adapter/engineering-second-order.parquet"
  },
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    "hierarchy_population": "visual_sensory",
    "input_mode": "spike_injection",
    "membership_file": "/data/digital-drosophila/experiments/phase4d-io/visual-adapter/reference-photoreceptor.parquet"
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}