SPAS.fit.model          Fit a Stratified-Petersen (SP) model using TMB.
SPAS.fit.model.legacy   Fit a Stratified-Petersen (SP) model using the
                        legacy method without TMB. The preferred method
                        is to use the SPAS.fit.model() function that
                        used TMB.
SPAS.print.model        Print the results from a fit of a
                        Stratified-Petersen (SP) model when using the
                        TMB optimizer
SPAS.print.model.legacy
                        Print the results from a fit of a
                        Stratified-Petersen (SP) model from the legacy
                        (i.e. pre using TMB) code
