llo()</code> method that
 automatically looks up <code>MyService</code> from the CDI container, instead of having to
 obtain a contextual reference manually.
 <p>
 Assuming that <code>builder</code> is an <code>InvokerBuilder</code> for <code>MyService.hello()</code>,
 such invoker can be built:

 <pre>
 builder.withInstanceLookup().build();
 </pre>

 Later, to invoke the <code>hello()</code> method, a framework could pass <code>null</code> as the instance:

 <pre>
 invoker.invoke(null, new Object[] { "worl