rface in java.util">Collection</a>&lt;<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;?&gt;&gt;&gt;&nbsp;register(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;callback,
                                            <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class o