code: function update(itemName, isSnapshot, data) {
  		var message, id = getIdFromItemName(itemName);
  		message = proto.writeUpdate(id, itemName, isSnapshot, data);
  		notify(message);
  		return that;
  	}
docs: Sends an update for a particular item to the remote LS proxy.
  
  @param {String} itemName the item name
  @param {Boolean} isSnapshot is it a snapshot?
  @param {Object} data an associative array of strings
  that represents the data to be published