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());
final Array transfResult = new Array(constrainedSABRError.include(projectedResult));
final Array result = transformation_.direct(transfResult);
itsCoeffs.alpha_ = result.get(0);
itsCoeffs.beta_ = result.get(1);
itsCoeffs.nu_ = result.get(2);