smoothing_convergence_reason_

property SuperLSS.smoothing_convergence_reason_: Literal['fixed_only', 'lambda_change', 'objective_plateau', 'practical_plateau', 'lambda_cap_unresolved', 'endpoint_revalidation_failed', 'max_iterations', 'objective_rejected', 'coefficient_not_converged', 'stationary', 'gradient_unresolved', 'derivative_unavailable'] | None

Return how automatic smoothing stopped, or None for a fixed fit.