ex.cause instanceof InvalidModelRuleException
        ex.cause.cause instanceof ModelRuleBindingException
        normaliseLineSeparators(ex.cause.cause.message) == incompatibleTypesMessage()
    }

    private String incompatibleTypesMessage() {
        """Model reference to element 'map.item' with type ${fullyQualifiedNameOf(specialItemClass)} is invalid due to incompatible types.