public SourceSession createSourceSession(ReplyHandler handler, SourceSessionParams params) {
        return createSourceSession(new SourceSessionParams(params).setReplyHandler(handler));
    }
<p>This is a convenience method to call {@link
#createSourceSession(SourceSessionParams)} by first assigning the reply
handler to the parameter object.</p>

@param handler The reply handler to receive the replies for the session.
@param params  The parameters to control the session.
@return The created session.
messagebus/src/main/java/com/yahoo/messagebus/MessageBus.java