How to remove container user fields?

Question

MODX

Greetings.
In additional fields there is a container with values.
Understood with change of these values. It, as I understand it, is an array, therefore it changed values ​​in a cycle.
But how to remove the container completely? Yes, even I think we'll start with the usual add. a field that is not a container?

$extended['моё_поле'] = "";

$profile->set('extended', $extended);
$profile->save();

changing the value to emptiness, as I wrote above, is not particularly suitable. How to remove the Add. field/container?
Thanks to.

Answer 1

Something stupid) since the container is an array, then what prevents you from doing unset ?
everything worked out.
unset($extended['мой_контейнер]);