12 string references to 'None'

Block::optionsSummary in drupal/core/modules/block/lib/Drupal/block/Plugin/views/display/Block.php
Provide the summary for page options in the views UI.
DisplayPluginBase::optionsSummary in drupal/core/modules/views/lib/Drupal/views/Plugin/views/display/DisplayPluginBase.php
Provide the default summary for options in the views UI.
Feed::optionsSummary in drupal/core/modules/views/lib/Drupal/views/Plugin/views/display/Feed.php
Overrides \Drupal\views\Plugin\views\display\DisplayPluginBase::optionsSummary().
FormTest::testRequiredFields in drupal/core/modules/system/lib/Drupal/system/Tests/Form/FormTest.php
Check several empty values for required forms elements.
language_name in drupal/core/includes/bootstrap.inc
Produced the printed name for a language for display.
None::summaryTitle in drupal/core/modules/views/lib/Drupal/views/Plugin/views/cache/None.php
Return a string to display as the clickable title for the access control.
ProgrammaticTest::submitForm in drupal/core/modules/system/lib/Drupal/system/Tests/Form/ProgrammaticTest.php
Helper function used to programmatically submit the form defined in form_test.module with the given values.
SystemConfigFormBase::testConfigForm in drupal/core/modules/system/lib/Drupal/system/Tests/System/SystemConfigFormBase.php
Submit the system_config_form ensure the configuration has expected values.
system_logging_settings in drupal/core/modules/system/system.admin.inc
Form builder; Configure error reporting settings.
Table::buildOptionsForm in drupal/core/modules/views/lib/Drupal/views/Plugin/views/style/Table.php
Render the given style.
template_preprocess_views_ui_view_info in drupal/core/modules/views/views_ui/theme/theme.inc
Implements hook_preprocess_HOOK() for theme_views_ui_view_info().
theme_views_ui_style_plugin_table in drupal/core/modules/views/views_ui/theme/theme.inc
Theme the form for the table style plugin