pub unsafe extern "C" fn SUNLinSolSpace_PCG(
S: SUNLinearSolver,
lenrwLS: *mut c_long,
leniwLS: *mut c_long,
) -> SUNErrCodepub unsafe extern "C" fn SUNLinSolSpace_PCG(
S: SUNLinearSolver,
lenrwLS: *mut c_long,
leniwLS: *mut c_long,
) -> SUNErrCode