> +    * @return predicate that matches endPort
> +    */
> +   public static Predicate<SecurityGroupRule> ruleEndPort(final int endPort) 
> {
> +      checkNotNull(endPort, "endPort must be defined");
> +
> +      return new Predicate<SecurityGroupRule>() {
> +         @Override
> +         public boolean apply(SecurityGroupRule ext) {
> +            return endPort == ext.getToPort();
> +         }
> +
> +         @Override
> +         public String toString() {
> +            return "ruleEndPort(" + endPort + ")";
> +         }
> +      };

Worth combining the start and end port rules into a "portRule", or not enough 
duplication to worry about that..?

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