pub unsafe extern "C" fn CVode(
cvode_mem: *mut c_void,
tout: sunrealtype,
yout: N_Vector,
tret: *mut sunrealtype,
itask: c_int,
) -> c_intpub unsafe extern "C" fn CVode(
cvode_mem: *mut c_void,
tout: sunrealtype,
yout: N_Vector,
tret: *mut sunrealtype,
itask: c_int,
) -> c_int