OptimMethod
The column titled #OptimMethod in the table associated with the key _Sparse SABR Paramsis mandatory and contains elements of type Integer.
Each element represents an integer that indicates to the kind of criteria that was used by the optimization routine in order to reach the solution, according to the map:
1 <-> Max Iterations
2 <-> Stationary Point
3 <-> Stationary Function Value
4 <-> Stationary Function Accuracy
5 <-> Zero Gradient Norm