@Override
			public void modifyOriginal(ProgramDB program) throws Exception {
				DataTypeManager dtm = program.getDataTypeManager();

				Structure inner = new StructureDataType("inner", 0);
				inner.add(new ByteDataType());
				inner.add(new WordDataType());
				inner.setPackingEnabled(true);

				Category rootCategory = dtm.getCategory(rootPath);
				rootCategory.addDataType(inner, null);

				inner = (Structure) dtm.getDataType(rootPath, "inner");
				assertNotNull(inner);
			}
Data type merge tests with fixup for data types added in My program.
Ghidra/Features/Base/src/test.slow/java/ghidra/app/merge/datatypes/DataTypeMergeFixupTest.java