}

    private <P extends ValueSourceParameters> void configureParameters(@Nullable P parameters, Action<? super ValueSourceSpec<P>> configureAction) {
        DefaultValueSourceSpec<P> valueSourceSpec = Cast.uncheckedNonnullCast(specInstantiator.newInstance(
            DefaultValueSourceSpec.class,
            parameters
        ));
        configureAction.execute(valueSourceSpec);
    }

    @Nullable