Problem/Motivation
This is a follow-up to #3372097: Consider replacing hook_field_type_category_info with YML based plugin discovery
In core/lib/Drupal/Core/Field/FallbackFieldTypeCategory.php, consider eliminating the need for the 'unique_identifier' array item altogether by consistently using unique ID for the plugin ID.
Comments
Comment #3
wim leersSurfaced by @lauriii in #3372092: Allow field_type_categories.yml entries to define asset libraries.