API Reference > bentleyjs-core > Ids > CompressedId64Set > CompressedId64Set.decompressSet CompressedId64Set.decompressSet Function Decompress the compact string representation of an Id64Set into an Id64Set. decompressSet(compressedIds: string, out?: Id64Set): Id64Set throws Error if compressedIds is not a well-formed CompressedId64Set. see CompressedId64Set.compressSet to perform the inverse operation. see CompressedId64Set.decompressArray to decompress as an Id64Array instead. see CompressedId64Set.iterable to efficiently iterate the Ids. Parameter Type Description compressedIds string The compact string representation. out Id64Set If supplied, the Ids will be inserted into this set rather than allocating and returning a new set. Returns - Id64Set The set containing the decompressed Ids. Defined in core/bentley/src/CompressedId64Set.ts Line 325 Last Updated: 12 June, 2024