href="../retrofit/converter/Converter.html" title="interface in retrofit.converter"><code>Converter</code></a>. If the callback parameter type uses a wildcard,
 the lower bound will be used as the conversion type.
 <li>On the current thread returning the response or throwing a <a href="../retrofit/RetrofitError.html" title="class in retrofit"><code>RetrofitError</code></a>. The HTTP
 response will be converted to the method's return type using the specified
 <a href="../retrofit/converter/Converter.html" ti