API Reference > imodeljs-common > Geometry > GeometryStreamIteratorEntry > partId partId partId: undefined | Id64String Current iterator entry is a GeometryPart instance when partId is not undefined. note Can also use GeometryStreamIteratorEntry.primitive and switch on the primitive type. Defined in core/common/src/geometry/GeometryStream.ts Line 439 Last Updated: 13 June, 2024