Method add

output/java_guava/1.4.17/Primitives.java:64–71

(
    Map<Class<?>, Class<?>> forward,
    Map<Class<?>, Class<?>> backward,
    Class<?> key,
    Class<?> value)

  private static void add(
    Map<Class<?>, Class<?>> forward,
    Map<Class<?>, Class<?>> backward,
    Class<?> key,
    Class<?> value) {
    forward.put(key, value);
    backward.put(value, key);
  }

  /**
   * Returns an immutable set of all nine primitive types (including {@code