final Array inversedTransformatedGuess = new Array(transformation_.inverse(guess));
final ProjectedCostFunction constrainedSABRError = new ProjectedCostFunction(costFunction, inversedTransformatedGuess, parameterAreFixed);
final Array projectedGuess = new Array(constrainedSABRError.project(inversedTransformatedGuess));
final NoConstraint constraint = new NoConstraint();
final Problem problem = new Problem(constrainedSABRError, constraint, projectedGuess);
itsCoeffs.SABREndCriteria_ = optMethod_.minimize(problem, endCriteria_);
final Array projectedResult = new Array(problem.currentValue());