public static Builder newBuilder(Class<? extends IClientConfig> implClass) {
            Builder builder = new Builder();
            try {
                builder.config = implClass.newInstance();
            } catch (Exception e) {
                throw new IllegalArgumentException(e);
            }
            return builder;        
        }
Create a builder to build the configuration with no initial properties set

 @param implClass the class of {@link IClientConfig} object to be built
ribbon-core/src/main/java/com/netflix/client/config/IClientConfig.java