code: public void setMutableContent(boolean mutable) throws JSONException {
  		if (mutable == true) {
  			logger.debug("Setting mutable content");
  			put("mutable-content", 1, this.apsDictionary, false);
  		} else {
  			logger.debug("Removing mutable content");
  			remove("mutable-content", this.apsDictionary);
  		}
  	}
docs: Sets the mutable content.
  
  @param mutable
  @throws JSONException