if (!mandatoryKeys.isEmpty()) {
            Collection<String> missingKeys = toStringList(mandatoryKeys);
            missingKeys.removeAll(toStringList(properties.keySet()));
            if (!missingKeys.isEmpty()) {
                throw new IncompleteInputException("Input configuration map does not contain following mandatory keys: " + missingKeys, missingKeys);
            }
        }
        return configureByMap(properties, delegate);

        given:
        Bean obj = new Bean()

        when:
        ConfigureUtil.configureByMap([prop: 'value'], obj, ['foo'])

        then:
        def e = thrown(IncompleteInputException)
        e.missingKeys.contains("foo")

        when:
        ConfigureUtil.configureByMap([prop: 'value'], obj, ['prop'])

        then:
        assert obj.prop == 'value'
    }