pub unsafe extern "C" fn igraph_strvector_reserve(
sv: *mut igraph_strvector_t,
capacity: igraph_int_t,
) -> igraph_error_tpub unsafe extern "C" fn igraph_strvector_reserve(
sv: *mut igraph_strvector_t,
capacity: igraph_int_t,
) -> igraph_error_t