code: public RedGBuilder<T> withDefaultValueStrategy(final DefaultValueStrategy strategy) {
          if (instance == null) {
              throw new IllegalStateException("Using the builder after build() was called is not allowed!");
          }
          instance.setDefaultValueStrategy(strategy);
          return this;
      }
docs: Sets the default value strategy
  @param strategy The default value strategy
  @return The builder itself
  @see AbstractRedG#setDefaultValueStrategy(DefaultValueStrategy)