private void createStructureInStructure() {
		int id = program.startTransaction("Structure");

		Structure struct = new StructureDataType("ParentStructure", 0);
		Structure child = new StructureDataType("ChildStructure", 0);
		child.add(new ByteDataType());
		child.add(new ByteDataType());

		struct.add(child);
		struct.add(new ByteDataType()); // a child below the first child structure

		CreateStructureCmd cmd = new CreateStructureCmd(struct, addr(NESTED_STRUCT_ADDR));

		cmd.applyTo(program);
		program.endTransaction(id, true);

		// structure at 100101b - create refs to the parent structure and to the
		// child structure (this will be offcut at the parent level), and an element below the
		// first child structure.
		builder.createMemoryReference("1001012", NESTED_STRUCT_ADDR, RefType.DATA,
			SourceType.DEFAULT, 0);
		builder.createMemoryReference("1001013", "100101c", RefType.DATA, SourceType.DEFAULT, 0);
		builder.createMemoryReference("1001014", "100101d", RefType.DATA, SourceType.DEFAULT, 0);
	}
Adds a listing field to the given model.

@param model the model to updated
@param fieldName the name of the field to add
@param column the column where the field should be displayed
Ghidra/Features/Base/src/test.slow/java/ghidra/app/util/viewer/field/XrefViewerTest.java