@maplibre/native-ffi
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    Type Alias FeatureId

    FeatureId:
        | { kind: "stringValue"; value: string }
        | { kind: "uintValue"; value: bigint }
        | { kind: "intValue"; value: bigint }
        | { kind: "doubleValue"; value: number }

    The ID of a feature in a source, as the source's data gives it.

    The map compares feature IDs as text. A number names the same feature as the string of its shortest decimal form, so 7, 7.0, and "7" name one feature.

    See mln_feature_id in the C API reference.