Its type must be a <a href="#Type_definitions">defined</a> type <code>T</code> or a
pointer to a defined type <code>T</code>. <code>T</code> is called the receiver
<i>base type</i>. A receiver base type cannot be a pointer or interface type and
it must be defined in the same package as the method.
The method is said to be <i>bound</i> to its receiver base type and the method name