@Override
	public boolean isSortable(int columnIndex) {
		if (columnIndex == READ || columnIndex == WRITE || columnIndex == EXECUTE ||
			columnIndex == VOLATILE || columnIndex == ARTIFICIAL || columnIndex == INIT) {
			return false;
		}
		return true;
	}
Table Model for a Table where each entry represents a MemoryBlock from a Program's Memory.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/memory/MemoryMapModel.java