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

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

Information about options for all kinds of purposes will be held here.

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

Information about options for all kinds of purposes will be held here.

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

Information about options for all kinds of purposes will be held here.

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

Information about options for all kinds of purposes will be held here.

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

Information about options for all kinds of purposes will be held here.

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

Information about options for all kinds of purposes will be held here.