</span> * An empty function by default, but provided so that you can perform a custom action
* after a valid drop has occurred by providing an implementation.
* @param {Object} target The target DD
* @param {Event} e The event object
* @param {String} id The id of the dropped element
</span> * An empty function by default, but provided so that you can perform a custom action
* after a valid drop has occurred by providing an implementation.
* @param {Object} target The target DD
* @param {Event} e The event object
* @param {String} id The id of the dropped element