public boolean supports( String namespace ) {
        return getHandler( namespace ) != null;
    }
Determines if this instance has support (formally: has a IQ Handler) for the provided namespace.

@param namespace Identifier of functionality (cannot be null)
@return true if the functionality identified by the namespace is supported, otherwise false.
xmppserver/src/main/java/org/jivesoftware/openfire/IQRouter.java