49 PetscErrorCode (*IJacobian)(TS, PetscReal, Vec, Vec, PetscReal, Mat, Mat, void *);  variable
1038     IJacobian   = IJacobian_Hull1972A1;  in Initialize()
1044     IJacobian   = IJacobian_Hull1972A2;  in Initialize()
1050     IJacobian   = IJacobian_Hull1972A3;  in Initialize()
1056     IJacobian   = IJacobian_Hull1972A4;  in Initialize()
1062     IJacobian   = IJacobian_Hull1972A5;  in Initialize()
1068     IJacobian   = IJacobian_Hull1972B1;  in Initialize()
1075     IJacobian   = IJacobian_Hull1972B2;  in Initialize()
1082     IJacobian   = IJacobian_Hull1972B3;  in Initialize()
1089     IJacobian   = IJacobian_Hull1972B4;  in Initialize()
1096     IJacobian   = IJacobian_Hull1972B5;  in Initialize()
1106     IJacobian   = IJacobian_Kulikov2013I;  in Initialize()
1111     IJacobian   = IJacobian_Hull1972C1;  in Initialize()
1116     IJacobian   = IJacobian_Hull1972C2;  in Initialize()
1121     IJacobian   = IJacobian_Hull1972C34;  in Initialize()
1225     PetscCall(TSSetIJacobian(ts, Jac, Jac, IJacobian, &ptype[0]));  in SolveODE()