[SOLVED] How to set a Laravel Nova field to display as readonly or protected?

Within Laravel Nova (v1.0.3), there are several methods that grant fine-grained control of the visibility of a resource field (canSee, showOnDetail, etc.). I can't find any methods that control if a field is editable. How can I display a field, but prevent the user from being able to edit it (make it readonly)?

For example, I'd like to display the "Created At" field, but I don't want the user to be able to change it.

This capability was added in v1.1.4 (October 1, 2018).

Allow setting any attribute on text and textarea fields

Example usage:

Text:: make('SomethingImportant')
    ->withMeta(['extraAttributes' => [
          'readonly' => true
    ]]),