Allow templating elements (such as <template> and template-related attributes.
This still requires other validators to allow regular attributes to be bound (such as allowHtml5).
Source
/**
* Allow templating elements (such as <template> and template-related
* attributes.
*
* This still requires other validators to allow regular attributes to be
* bound (such as [allowHtml5]).
*/
void allowTemplating() {
add(new _TemplatingNodeValidator());
}