and <code>B2</code> is <code>string</code>.
The underlying type of <code>[]B1</code>, <code>B3</code>, and <code>B4</code> is <code>[]B1</code>.
</p>

<h3 id="Method_sets">Method sets</h3>
<p>
A type has a (possibly empty) <i>method set</i> associated with it.
The method set of an <a href="#Interface_types">interface type</a> is its interface.

<code>T</code>, promoted methods are included in the method set of the struct as follows:
</p>
<ul>
	<li>
	If <code>S</code> contains an embedded field <code>T</code>,
	the <a href="#Method_sets">method sets</a> of <code>S</code>
	and <code>*S</code> both include promoted methods with receiver
	<code>T</code>. The method set of <code>*S</code> also
	includes promoted methods with receiver <code>*T</code>.