private void gatherRelatedTypes(DataType dt, Set<DataType> types) {

		types.add(dt);

		for (DataType parent : dt.getParents()) {
			buildTypeLineage(parent, types);
		}
	}
Implementation of {@link DataTypeReferenceFinder} that uses the Decompiler's output
to find data type and composite field usage.
Ghidra/Features/DecompilerDependent/src/main/java/ghidra/app/extension/datatype/finder/DecompilerDataTypeReferenceFinder.java