code: @SuppressWarnings("unchecked")
    public static <V> V get(String key) {
      return (V) share.get().get(key);
    }
docs: Get the specific key value
  
  @param key the key
  @param <V> the expected return type
  @return the value or <tt>null</tt> if there was no mapping for <tt>key</tt>