6 methods override HandlerBase::init() in Drupal 8

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

Overrides Drupal\views\Plugin\views\HandlerBase::init().

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

Overrides Drupal\views\Plugin\views\HandlerBase:init().

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

Initialize the plugin.

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

Overrides \Drupal\views\Plugin\views\HandlerBase::init().

GroupByNumeric::init in core/modules/views/src/Plugin/views/sort/GroupByNumeric.php

Initialize the plugin.

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

Overrides \Drupal\views\Plugin\views\HandlerBase::init().