code: public static BooleanExpression anyOf(BooleanExpression... exprs) {
          BooleanExpression rv = null;
          for (BooleanExpression b : exprs) {
              rv = rv == null ? b : rv.or(b);
          }
          return rv;
      }
docs: Get the union of the given Boolean expressions
  
  @param exprs predicates
  @return union of predicates