//From a property-level constraint on  User.addresses
//Build a constraint violation on the default path + the bean stored
//under the "home" key in the map
context.buildConstraintViolationWithTemplate( "Incorrect home address" )
            .addBeanNode()
                .inContainer( Map.class, 1 )
                .inIterable().atKey( "home" )
            .addConstraintViolation();