+ * A 'destructive' operation is any operation that changes the set of
+ * matched jQuery elements. These functions are: <code>add</code>,
+ * <code>children</code>, <code>clone</code>, <code>filter</code>,
+ * <code>find</code>, <code>not</code>, <code>next</code>,
+ * <code>parent</code>, <code>parents</code>, <code>prev</code> and <code>siblings</code>.
+ *