@Nullable
  private static FunctionExprent findInstanceofExprent(@NotNull IfStatement ifStat) {
    return ifStat.getHeadexprent().getAllExprents(true).stream()
      .filter(expr -> expr.type == Exprent.EXPRENT_FUNCTION).map(expr -> (FunctionExprent)expr)
      .filter(expr -> expr.getFuncType() == FunctionExprent.FUNCTION_INSTANCEOF)
      .findFirst().orElse(null);
  }
@Nullable
  private static FunctionExprent findInstanceofExprent(@NotNull IfStatement ifStat)