@Override
    public String toString() {
        return "method " + name + "(" + paramTypes + ")" + ( returnTypes.length()>0 ? ": " + returnTypes : "");
    }
Invoke this method. The given request holds the parameters and
will be given as parameter to the handler method.

@param req the request causing this invocation
jrt/src/com/yahoo/jrt/Method.java