@Override
    public void rename(@NotNull String oldName, @NotNull ChainVariable newVar, @NotNull OptionalToIfContext context) {
      myArg = FunctionHelper.replaceVarReference(myArg, oldName, newVar.getName(), context);
    }
@Override
    public void rename(@NotNull String oldName, @NotNull ChainVariable newVar, @NotNull OptionalToIfContext context)