public Method paramDesc(int index, String name, String desc) {
        paramName[index] = name;
        paramDesc[index] = desc;
        return this;
    }
Describe a parameter of this method. This adds documentation
that can be obtained through remote reflection.

@return this Method, to allow chaining
@param index the parameter index
@param name the parameter name
@param desc the parameter description
jrt/src/com/yahoo/jrt/Method.java