code: public Postcard withShortArray(@Nullable String key, @Nullable short[] value) {
          mBundle.putShortArray(key, value);
          return this;
      }
docs: Inserts a short array value into the mapping of this Bundle, replacing
  any existing value for the given key.  Either key or value may be null.
  
  @param key   a String, or null
  @param value a short array object, or null
  @return current