Fetches for some virtufin.finance.scenario.MarketObservables from a virtufin.finance.model.ModelContext the virtufin.finance.model.BlackParameters and for each pair of virtufin.finance.scenario.MarketObservables the virtufin.math.Correlation and builds from that a virtufin.finance.model.MultivariateBlackParameters
virtufin.finance.scenario.MarketObservables for which the virtufin.finance.model.ModelContext does not contain a virtufin.finance.model.BlackParameters