Method exists

core/src/main/java/org/apache/calcite/rex/RexUtil.java:1923–1931

Returns whether there is an element in list for which predicate is true.

(
      List<? extends E> list, Predicate1<E> predicate)

   * {@code predicate} is true.
   */
  public static <E> boolean exists(
      List<? extends E> list, Predicate1<E> predicate) {
    for (E e : list) {
      if (predicate.apply(e)) {
        return true;
      }
    }
    return false;
  }

  /**
   * Returns whether {@code predicate} is true for all elements of