Replaces current node in parent‘s children list with passed nodes
@param {AbbreviationNode} node Replacement node or array of nodes
function() {
			var parent = this.parent;
			var ix = _.indexOf(parent.children, this);
			var items = _.flatten(arguments);
			spliceFn.apply(parent.children, [ix, 1].concat(items));
			
			// update parent
			_.each(items, function(item) {
				item.parent = parent;
			});
		}