findClassInstance(node) {
			let inst = null;

			do {
				inst = this.data(node, '_class');
				node = node.parentNode;
			}
			while (!(inst instanceof Class) && node != null);

			return inst;
		}
Finds a bound class instance on the given node itself or the
first bound instance on its closest parent node.

@instance
@memberof LuCI.dom
@param {Node} node
The DOM `Node` instance to start from.

@returns {Class|null}
Returns the founds class instance if any or `null` if no bound
class could be found on the node itself or any of its parents.