public Builder<T> R(
			final String name,
			final Consumer<? super Rule.Builder<T>> builder
		) {
			return R(new NonTerminal<>(name), builder);
		}
Building a new rule for the CFG.

@param name the rule name
@param builder the rule builder
@return {@code this} builder for method chaining
jenetics.ext/src/main/java/io/jenetics/ext/grammar/Cfg.java