mlir::ModuleOp module = getOperation();

  RewritePatternSet pattern_list(&getContext());
  pattern_list.add<HandleOptionalFrom>(&getContext());
  pattern_list.add<HandleOptionalGet>(&getContext());
  pattern_list.add<HandleOptionalNone>(&getContext());
  pattern_list.add<HandleFunc>(&getContext());
  pattern_list.add<HandleCall>(&getContext());
  pattern_list.add<HandleIf>(&getContext());