Sometimes, you've got a Drupal twig function that doesn't exist in PatternLab, and it prevents PatternLab from building. You get an "Unknown filter" error. What you need to do is create a Twig stub that does either what you need it to, or nothing at all. In emulsify, twig functions exist at emulsify/components/_twig-components/filters. For example, to create a typogrify filter, create a file called typogrify.filter.php…
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