/** * Opens and returns the writer for the {@code imageSubRegion} property. The {@code imageSubRegion} property defines a sub-region of the image which will be used for the billboard, rather than the entire image, measured in pixels from the bottom-left. */ @Nonnull public final BoundingRectangleCesiumWriter openImageSubRegionProperty() { openIntervalIfNecessary(); return this.<BoundingRectangleCesiumWriter> openAndReturn(getImageSubRegionWriter()); }