+ this.before(insertion.ofNode);
+ }
+ insertion.ofNode.append(this);
+ return insertion.ofNode;
+ },
+
+ /**
+ * Removes parent of a node if node has no siblings.
+ */
+ unwrap: function() {
+ if(this.isRoot()) {
+ return;
+ }
+ var parent = this.parent(),
+ grandParent;
+ if(parent.contents().length === 1) {
+ grandParent = parent.parent();
+ parent.unwrapContent();
+ return grandParent;