ode class="code">len</code> bytes from sequence
    <code class="code">src</code>, starting at index <code class="code">src_pos</code>, to sequence <code class="code">dst</code>, starting at
    index <code class="code">dst_pos</code>. It works correctly even if <code class="code">src</code> and <code class="code">dst</code> are the
    same byte sequence, and the source and destination intervals
    overlap.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if <code cl