IFClite TypeScript API
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    Interface TerrainSurfaceResult

    interface TerrainSurfaceResult {
        coordinateListId: number;
        elementId: number;
        tinId: number;
    }
    Index
    coordinateListId: number
    elementId: number
    tinId: number

    The IfcTriangulatedIrregularNetwork, so a caller can assert on it directly.