pub unsafe extern "C" fn igraph_sparsemat_normalize_cols(
sparsemat: *mut igraph_sparsemat_t,
allow_zeros: igraph_bool_t,
) -> igraph_error_tpub unsafe extern "C" fn igraph_sparsemat_normalize_cols(
sparsemat: *mut igraph_sparsemat_t,
allow_zeros: igraph_bool_t,
) -> igraph_error_t