@Override
	public DataType toDataType() throws DuplicateNameException, IOException {
		StructureDataType struct = new StructureDataType("dylib_table_of_contents", 0);
		struct.add(DWORD, "symbol_index", null);
		struct.add(DWORD, "module_index", null);
		struct.setCategoryPath(new CategoryPath(MachConstants.DATA_TYPE_CATEGORY));
		return struct;
	}
An index into the module table indicating the module in which this defined
external symbol is defined.
@return an index into the module table
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/macho/commands/TableOfContents.java