7 methods override CacheBackendInterface::deleteAll()

ApcuBackend::deleteAll in core/lib/Drupal/Core/Cache/ApcuBackend.php
Deletes all cache items in a bin.
BackendChain::deleteAll in core/lib/Drupal/Core/Cache/BackendChain.php
Deletes all cache items in a bin.
ChainedFastBackend::deleteAll in core/lib/Drupal/Core/Cache/ChainedFastBackend.php
Deletes all cache items in a bin.
DatabaseBackend::deleteAll in core/lib/Drupal/Core/Cache/DatabaseBackend.php
Deletes all cache items in a bin.
MemoryBackend::deleteAll in core/lib/Drupal/Core/Cache/MemoryBackend.php
Deletes all cache items in a bin.
NullBackend::deleteAll in core/lib/Drupal/Core/Cache/NullBackend.php
Deletes all cache items in a bin.
PhpBackend::deleteAll in core/lib/Drupal/Core/Cache/PhpBackend.php
Deletes all cache items in a bin.

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.