6 string references to 'Theme' in Drupal 8

block.schema.yml in core/modules/block/config/schema/block.schema.yml

core/modules/block/config/schema/block.schema.yml

BlockForm::form in core/modules/block/src/BlockForm.php

Gets the actual form array to be built.

ConfigTranslationBlockListBuilder::buildHeader in core/modules/config_translation/src/Controller/ConfigTranslationBlockListBuilder.php

Builds the header row for the entity listing.

CurrentThemeCondition::buildConfigurationForm in core/modules/system/src/Plugin/Condition/CurrentThemeCondition.php

Form constructor.

ThemeCacheContext::getLabel in core/lib/Drupal/Core/Cache/Context/ThemeCacheContext.php

Returns the label of the cache context.

User::baseFields in core/modules/user/src/Plugin/migrate/source/d6/User.php

Returns the user base fields to be migrated.