@Override
	public boolean isShowingUndefinedBytes() {
		return !viewComposite.isPackingEnabled();
	}
Returns the number of bytes that are included in the current selection
range.

@param range the range of indices for the component's whose sizes should
be added together.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/StructureEditorModel.java