public R isLessThan(V upper) {
    return create(e -> Expressions.call(Operators.LESS_THAN, e, Expressions.literal(upper)));
  }
public R isLessThan(V upper) {
    return create(e -> Expressions.call(Operators.LESS_THAN, e, Expressions.literal(upper)));
  }
public R isLessThan ( V upper ) { return create ( e -> Expressions . call ( Operators . LESS_THAN , e , Expressions . literal ( upper ) ) ) ; }
]
Checks that attribute is less than (but not equal to) {@code upper}.
<p>Use {@link #isAtMost(Comparable)} for less <i>or equal</i> comparison</p>
] Checks that attribute is less than ( but not equal to ) {