pub unsafe extern "C" fn igraph_sparsemat_arpack_rssolve(
A: *const igraph_sparsemat_t,
options: *mut igraph_arpack_options_t,
storage: *mut igraph_arpack_storage_t,
values: *mut igraph_vector_t,
vectors: *mut igraph_matrix_t,
solvemethod: igraph_sparsemat_solve_t,
) -> igraph_error_t