public virtual void metadata()
        {
            CurveGroupName groupName = CurveGroupName.of("Curve Group");

            InterpolatedNodalCurveDefinition fraCurveDefn = CurveTestUtils.fraCurveDefinition();
            IList <CurveNode> fraNodes = fraCurveDefn.Nodes;

            RatesCurveGroupDefinition groupDefn = RatesCurveGroupDefinition.builder().name(groupName).addForwardCurve(fraCurveDefn, IborIndices.USD_LIBOR_3M).build();

            MarketDataConfig marketDataConfig = MarketDataConfig.builder().add(groupName, groupDefn).build();

            RatesCurveGroupId curveGroupId = RatesCurveGroupId.of(groupName);

//JAVA TO C# CONVERTER WARNING: Java wildcard generics have no direct equivalent in .NET:
//ORIGINAL LINE: java.util.Map<com.opengamma.strata.data.MarketDataId<?>, double> fraInputData = com.google.common.collect.ImmutableMap.builder<com.opengamma.strata.data.MarketDataId<?>, double>().put(CurveTestUtils.key(fraNodes.get(0)), 0.003).put(CurveTestUtils.key(fraNodes.get(1)), 0.0033).put(CurveTestUtils.key(fraNodes.get(2)), 0.0037).put(CurveTestUtils.key(fraNodes.get(3)), 0.0054).put(CurveTestUtils.key(fraNodes.get(4)), 0.007).put(CurveTestUtils.key(fraNodes.get(5)), 0.0091).put(CurveTestUtils.key(fraNodes.get(6)), 0.0134).build();
            IDictionary <MarketDataId <object>, double> fraInputData = ImmutableMap.builder <MarketDataId <object>, double>().put(CurveTestUtils.key(fraNodes[0]), 0.003).put(CurveTestUtils.key(fraNodes[1]), 0.0033).put(CurveTestUtils.key(fraNodes[2]), 0.0037).put(CurveTestUtils.key(fraNodes[3]), 0.0054).put(CurveTestUtils.key(fraNodes[4]), 0.007).put(CurveTestUtils.key(fraNodes[5]), 0.0091).put(CurveTestUtils.key(fraNodes[6]), 0.0134).build();

            LocalDate          valuationDate  = date(2011, 3, 8);
            RatesCurveInputs   fraCurveInputs = RatesCurveInputs.of(fraInputData, fraCurveDefn.metadata(valuationDate, REF_DATA));
            ScenarioMarketData marketData     = ImmutableScenarioMarketData.builder(valuationDate).addValue(RatesCurveInputsId.of(groupName, fraCurveDefn.Name, ObservableSource.NONE), fraCurveInputs).build();

            RatesCurveGroupMarketDataFunction function   = new RatesCurveGroupMarketDataFunction();
            MarketDataBox <RatesCurveGroup>   curveGroup = function.build(curveGroupId, marketDataConfig, marketData, REF_DATA);

            // Check the FRA curve identifiers are the expected tenors
            Curve forwardCurve = curveGroup.SingleValue.findForwardCurve(IborIndices.USD_LIBOR_3M).get();
            IList <ParameterMetadata> forwardMetadata = forwardCurve.Metadata.ParameterMetadata.get();

//JAVA TO C# CONVERTER TODO TASK: Method reference arbitrary object instance method syntax is not converted by Java to C# Converter:
//JAVA TO C# CONVERTER TODO TASK: Most Java stream collectors are not converted by Java to C# Converter:
            IList <object> forwardTenors = forwardMetadata.Select(ParameterMetadata::getIdentifier).collect(toImmutableList());

            IList <Tenor> expectedForwardTenors = ImmutableList.of(Tenor.TENOR_4M, Tenor.TENOR_5M, Tenor.TENOR_6M, Tenor.TENOR_9M, Tenor.TENOR_12M, Tenor.ofMonths(15), Tenor.ofMonths(21));

            assertThat(forwardTenors).isEqualTo(expectedForwardTenors);

//JAVA TO C# CONVERTER TODO TASK: Most Java stream collectors are not converted by Java to C# Converter:
            IList <ParameterMetadata> expectedForwardMetadata = fraNodes.Select(node => node.metadata(valuationDate, REF_DATA)).collect(toImmutableList());

            assertThat(forwardMetadata).isEqualTo(expectedForwardMetadata);
        }
        /// <summary>
        /// Tests calibration a curve containing FRAs and pricing the curve instruments using the curve.
        /// </summary>
        public virtual void roundTripFra()
        {
            InterpolatedNodalCurveDefinition curveDefn = CurveTestUtils.fraCurveDefinition();

//JAVA TO C# CONVERTER TODO TASK: Most Java stream collectors are not converted by Java to C# Converter:
            IList <FraCurveNode> nodes = curveDefn.Nodes.Select(typeof(FraCurveNode).cast).collect(toImmutableList());

//JAVA TO C# CONVERTER WARNING: Java wildcard generics have no direct equivalent in .NET:
//ORIGINAL LINE: java.util.List<com.opengamma.strata.data.MarketDataId<?>> keys = nodes.stream().map(CurveTestUtils::key).collect(toImmutableList());
//JAVA TO C# CONVERTER TODO TASK: Most Java stream collectors are not converted by Java to C# Converter:
            IList <MarketDataId <object> > keys = nodes.Select(CurveTestUtils.key).collect(toImmutableList());
//JAVA TO C# CONVERTER WARNING: Java wildcard generics have no direct equivalent in .NET:
//ORIGINAL LINE: java.util.Map<com.opengamma.strata.data.MarketDataId<?>, double> inputData = com.google.common.collect.ImmutableMap.builder<com.opengamma.strata.data.MarketDataId<?>, double>().put(keys.get(0), 0.003).put(keys.get(1), 0.0033).put(keys.get(2), 0.0037).put(keys.get(3), 0.0054).put(keys.get(4), 0.007).put(keys.get(5), 0.0091).put(keys.get(6), 0.0134).build();
            IDictionary <MarketDataId <object>, double> inputData = ImmutableMap.builder <MarketDataId <object>, double>().put(keys[0], 0.003).put(keys[1], 0.0033).put(keys[2], 0.0037).put(keys[3], 0.0054).put(keys[4], 0.007).put(keys[5], 0.0091).put(keys[6], 0.0134).build();

            CurveGroupName   groupName   = CurveGroupName.of("Curve Group");
            CurveName        curveName   = CurveName.of("FRA Curve");
            RatesCurveInputs curveInputs = RatesCurveInputs.of(inputData, DefaultCurveMetadata.of(curveName));

            RatesCurveGroupDefinition groupDefn = RatesCurveGroupDefinition.builder().name(groupName).addCurve(curveDefn, Currency.USD, IborIndices.USD_LIBOR_3M).build();

            RatesCurveGroupMarketDataFunction function = new RatesCurveGroupMarketDataFunction();
            LocalDate          valuationDate           = date(2011, 3, 8);
            ScenarioMarketData inputMarketData         = ImmutableScenarioMarketData.builder(valuationDate).addValue(RatesCurveInputsId.of(groupName, curveName, ObservableSource.NONE), curveInputs).build();
            MarketDataBox <RatesCurveGroup> curveGroup = function.buildCurveGroup(groupDefn, CALIBRATOR, inputMarketData, REF_DATA, ObservableSource.NONE);

            Curve curve = curveGroup.SingleValue.findDiscountCurve(Currency.USD).get();

//JAVA TO C# CONVERTER WARNING: Java wildcard generics have no direct equivalent in .NET:
//ORIGINAL LINE: java.util.Map<com.opengamma.strata.data.MarketDataId<?>, Object> marketDataMap = com.google.common.collect.ImmutableMap.builder<com.opengamma.strata.data.MarketDataId<?>, Object>().putAll(inputData).put(com.opengamma.strata.market.curve.CurveId.of(groupName, curveName), curve).build();
            IDictionary <MarketDataId <object>, object> marketDataMap = ImmutableMap.builder <MarketDataId <object>, object>().putAll(inputData).put(CurveId.of(groupName, curveName), curve).build();

            MarketData            marketData         = ImmutableMarketData.of(valuationDate, marketDataMap);
            TestMarketDataMap     scenarioMarketData = new TestMarketDataMap(valuationDate, marketDataMap, ImmutableMap.of());
            RatesMarketDataLookup lookup             = RatesMarketDataLookup.of(groupDefn);
            RatesProvider         ratesProvider      = lookup.ratesProvider(scenarioMarketData.scenario(0));

            // The PV should be zero for an instrument used to build the curve
            nodes.ForEach(node => checkFraPvIsZero(node, ratesProvider, marketData));
        }