Function erlang_nif_sys::erlang_nif_sys_api::enif_make_new_binary

pub unsafe extern "C" fn enif_make_new_binary(
    arg1: *mut ErlNifEnv, 
    size: size_t, 
    termp: *mut ERL_NIF_TERM
) -> *mut c_uchar

See enif_make_new_binary in the Erlang docs.