+All of the above functions are not supported when the C<MEMCACHED_BEHAVIOR_USE_UDP>
+has been set. Executing any of these functions with this behavior on will result in
+C<MEMCACHED_NOT_SUPPORTED> being returned or, for those functions which do not return
+a C<memcached_return>, the error function parameter will be set to
+C<MEMCACHED_NOT_SUPPORTED>.
+