public boolean containsAddress(Address address) {
        for (MemberInfo member : members) {
            if (member.getAddress().equals(address)) {
                return true;
            }
        }

        return false;
    }
@Test
    public void containsAddress() {
        MemberImpl[] members = MemberMapTest.newMembers(3);
        MembersView view = MembersView.createNew(1, Arrays.asList(members));

        for (MemberImpl member : members) {
            assertTrue(view.containsAddress(member.getAddress()));
        }
    }