pub unsafe extern "C" fn rsb_spmm(
    transA: rsb_trans_t,
    alphap: *const c_void,
    mtxAp: *const rsb_mtx_t,
    nrhs: rsb_coo_idx_t,
    order: rsb_flags_t,
    Bp: *const c_void,
    ldB: rsb_nnz_idx_t,
    betap: *const c_void,
    Cp: *mut c_void,
    ldC: rsb_nnz_idx_t
) -> rsb_err_t