default Seq<T> prepend(Iterable<? extends T> other) {
        return Seq.<T>seq(other).concat(this);
    }
Concatenate two streams.
<p>
<pre><code>
// (1, 2, 3, 4, 5, 6)
Seq.of(4, 5, 6).prepend(Seq.of(1, 2, 3))
</code></pre>

@see #concat(Stream[])
jOOL/src/main/java/org/jooq/lambda/Seq.java