protected T getOriginalComposite() {
		T existingOriginal = getExistingOriginalComposite();
		return existingOriginal != null ? existingOriginal : originalComposite;
	}
Returns the original Composite DataType that currently exists within the original 
DataTypeManager, or if not found the instance originally loaded.
@return the original composite being viewed or null if nothing is currently loaded in
the model.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/CompositeViewerModel.java