@Override
	public DataType clone(DataTypeManager dtm) {
		// Internal to the PcodeDataTypeManager
		throw new UnsupportedOperationException("may not be cloned");
	}
@return the offset, in bytes, of this part within its parent Union
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/PartialUnion.java