/** * Opens and returns the writer for the {@code heightReference} property. The {@code heightReference} property defines the height reference of the model, which indicates if the position is relative to terrain or not. If not specified, the default value is NONE. */ @Nonnull public final HeightReferenceCesiumWriter openHeightReferenceProperty() { openIntervalIfNecessary(); return this.<HeightReferenceCesiumWriter> openAndReturn(getHeightReferenceWriter()); }