6 methods override SqlBase::doCount()

EntityTranslationSettings::doCount in core/modules/content_translation/src/Plugin/migrate/source/d7/EntityTranslationSettings.php
FieldInstance::doCount in core/modules/field/src/Plugin/migrate/source/d7/FieldInstance.php
Variable::doCount in core/modules/migrate_drupal/src/Plugin/migrate/source/Variable.php
VariableTranslation::doCount in core/modules/migrate_drupal/src/Plugin/migrate/source/d6/VariableTranslation.php
VariableTranslation::doCount in core/modules/migrate_drupal/src/Plugin/migrate/source/d7/VariableTranslation.php
ViewModeBase::doCount in core/modules/node/src/Plugin/migrate/source/d6/ViewModeBase.php

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