6 methods override HandlerBase::buildOptionsForm() in Drupal 9

AreaPluginBase::buildOptionsForm in core/modules/views/src/Plugin/views/area/AreaPluginBase.php

Provide a form to edit options for this plugin.

ArgumentPluginBase::buildOptionsForm in core/modules/views/src/Plugin/views/argument/ArgumentPluginBase.php

Provide a form to edit options for this plugin.

FieldPluginBase::buildOptionsForm in core/modules/views/src/Plugin/views/field/FieldPluginBase.php

Default options form that provides the label widget that all fields should have.

FilterPluginBase::buildOptionsForm in core/modules/views/src/Plugin/views/filter/FilterPluginBase.php

Provide the basic form which calls through to subforms. If overridden, it is best to call through to the parent, or to at least make sure all of the functions in this form are called.

RelationshipPluginBase::buildOptionsForm in core/modules/views/src/Plugin/views/relationship/RelationshipPluginBase.php

Provide a form to edit options for this plugin.

SortPluginBase::buildOptionsForm in core/modules/views/src/Plugin/views/sort/SortPluginBase.php

Basic options for all sort criteria.