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How do I output HTML from a text_long field in Twig?

What is the alternative to the |raw filter if I want to output html from a entity field in twig in Drupal 8?

According to this ticket, |raw should be avoided, but I can’t figure out how to use what they recommend in that ticket (Safestring/SafeMarkup) in twig.

I have a custom content entity that has a field definition as follows:

$fields['internal_description'] = BaseFieldDefinition::create('text_long')   ->setLabel(t('Internal description'))   ->setSettings(array(     'max_length' => 1500,   ))

The field stores HTML from a CKEditor instance. Now I would like to output this as HTML in a twig template. Currently if I just call 

{{  event.getExternalDescription }}

I get the escaped HTML as expected, however that is not what I want. If I do

{{  event.getExternalDescription | raw }}

I get what I want, which is unescaped, rendered HTML. However since it’s not checked in any way in this case, I would like to know how to make this output safe and still allow my users to use CKEditor for entering content?

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How do I output HTML from a text_long field in Twig?

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