android/guava/src/com/google/common/collect/ContiguousSet.java
@Beta
  public static ContiguousSet<Integer> closed(int lower, int upper) {
    return create(Range.closed(lower, upper), DiscreteDomain.integers());
  }
@Beta
  public static ContiguousSet<Integer> closed(int lower, int upper) {
    return create(Range.closed(lower, upper), DiscreteDomain.integers());
  }
@ Beta public static ContiguousSet < Integer > closed ( int lower , int upper ) { return create ( Range . closed ( lower , upper ) , DiscreteDomain . integers ( ) ) ; }
Returns a nonempty contiguous set containing all {@code int} values from {@code lower}
(inclusive) to {@code upper} (inclusive). (These are the same values contained in {@code
Range.closed(lower, upper)}.)

@throws IllegalArgumentException if {@code lower} is greater than {@code upper}
@since 23.0
Returns a nonempty contiguous set containing all { @code int } values from { @code lower } ( inclusive ) to { @code upper } ( inclusive ) . ( These are the same values contained in { @code Range . closed ( lower upper ) } . )