Method isNull

core/src/processing/data/JSONObject.java:924–926

Determine if the value associated with the key is null or if there is no value. @webref @param key A key string. @return true if there is no value associated with the key or if the value is the JSONObject.NULL object.

(String key)

   *  the value is the JSONObject.NULL object.
   */
  public boolean isNull(String key) {
    return JSONObject.NULL.equals(this.opt(key));
  }


  /**