{#
Adds a block of custom form fields.

extras - The fields to add.
errors - A dict of errors for the fields.
limit  - The total number of fields that should be output.
Example:

  {% snippet 'snippets/custom_form_fields.html', extras=data.extras, errors=errors, limit=3 %}

#}
{{ ui.extra_fields_collection(extras, errors, limit) }}