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Title	Object type	File name	Summary
EnvironmentCleanerInterface::cleanDatabase	function	core/lib/Drupal/Core/Test/EnvironmentCleanerInterface.php	Remove database entries left over in the fixture database.
EnvironmentCleanerInterface::cleanEnvironment	function	core/lib/Drupal/Core/Test/EnvironmentCleanerInterface.php	Removes all test-related database tables and directories.
EnvironmentCleanerInterface::cleanResultsTable	function	core/lib/Drupal/Core/Test/EnvironmentCleanerInterface.php	Clears test result tables from the results database.
EnvironmentCleanerInterface::cleanTemporaryDirectories	function	core/lib/Drupal/Core/Test/EnvironmentCleanerInterface.php	Finds all leftover fixture site directories and removes them.
EnvironmentCleanerTest	class	core/tests/Drupal/KernelTests/Core/Test/EnvironmentCleanerTest.php	@coversDefaultClass \Drupal\Core\Test\EnvironmentCleaner[[api-linebreak]] @group Test
EnvironmentCleanerTest.php	file	core/tests/Drupal/KernelTests/Core/Test/EnvironmentCleanerTest.php
EnvironmentCleanerTest::testDoCleanTemporaryDirectories	function	core/tests/Drupal/KernelTests/Core/Test/EnvironmentCleanerTest.php	@covers ::doCleanTemporaryDirectories[[api-linebreak]]
EnvironmentTest	class	core/tests/Drupal/Tests/Component/Utility/EnvironmentTest.php	Test PHP Environment helper methods.
EnvironmentTest.php	file	core/tests/Drupal/Tests/Component/Utility/EnvironmentTest.php
EnvironmentTest::providerTestCheckMemoryLimit	function	core/tests/Drupal/Tests/Component/Utility/EnvironmentTest.php	Provides data for testCheckMemoryLimit().
EnvironmentTest::testCheckMemoryLimit	function	core/tests/Drupal/Tests/Component/Utility/EnvironmentTest.php	Tests \Drupal\Component\Utility\Environment::checkMemoryLimit().
eo.php	file	core/lib/Drupal/Component/Transliteration/data/eo.php
Equality	class	core/modules/views/src/Plugin/views/filter/Equality.php	Simple filter to handle equal to / not equal to filters.
Equality.php	file	core/modules/views/src/Plugin/views/filter/Equality.php
Equality::$alwaysMultiple	property	core/modules/views/src/Plugin/views/filter/Equality.php	Exposed filter options.
Equality::operatorOptions	function	core/modules/views/src/Plugin/views/filter/Equality.php	Provide simple equality operator.
Equality::valueForm	function	core/modules/views/src/Plugin/views/filter/Equality.php	Provide a simple textfield for equality.
Error	class	core/lib/Drupal/Core/Utility/Error.php	Drupal error utility class.
Error.php	file	core/lib/Drupal/Core/Utility/Error.php
Error::$ignoredFunctions	property	core/lib/Drupal/Core/Utility/Error.php	An array of ignored functions.
Error::decodeException	function	core/lib/Drupal/Core/Utility/Error.php	Decodes an exception and retrieves the correct caller.
Error::DEFAULT_ERROR_MESSAGE	constant	core/lib/Drupal/Core/Utility/Error.php	The default message for logging errors.
Error::ERROR	constant	core/lib/Drupal/Core/Utility/Error.php	The error severity level.
Error::formatBacktrace	function	core/lib/Drupal/Core/Utility/Error.php	Formats a backtrace into a plain-text string.
Error::getLastCaller	function	core/lib/Drupal/Core/Utility/Error.php	Gets the last caller from a backtrace.
Error::renderExceptionSafe	function	core/lib/Drupal/Core/Utility/Error.php	Renders an exception error message without further exceptions.
ErrorCollection	class	core/modules/jsonapi/src/JsonApiResource/ErrorCollection.php	To be used when the primary data is `errors`.
ErrorCollection.php	file	core/modules/jsonapi/src/JsonApiResource/ErrorCollection.php
ErrorCollection::$errors	property	core/modules/jsonapi/src/JsonApiResource/ErrorCollection.php	The HTTP exceptions.
ErrorCollection::getIterator	function	core/modules/jsonapi/src/JsonApiResource/ErrorCollection.php	Returns an iterator for errors.
ErrorCollection::__construct	function	core/modules/jsonapi/src/JsonApiResource/ErrorCollection.php	Instantiates an ErrorCollection object.
ErrorContainer	class	core/tests/Drupal/FunctionalTests/Bootstrap/ErrorContainer.php	Container base class which triggers an error.
ErrorContainer.php	file	core/tests/Drupal/FunctionalTests/Bootstrap/ErrorContainer.php
ErrorContainer::get	function	core/tests/Drupal/FunctionalTests/Bootstrap/ErrorContainer.php
ErrorHandlerTest	class	core/modules/system/tests/src/Functional/System/ErrorHandlerTest.php	Performs tests on the Drupal error and exception handler.
ErrorHandlerTest.php	file	core/modules/system/tests/src/Functional/System/ErrorHandlerTest.php
ErrorHandlerTest::$defaultTheme	property	core/modules/system/tests/src/Functional/System/ErrorHandlerTest.php	The theme to install as the default for testing.
ErrorHandlerTest::$modules	property	core/modules/system/tests/src/Functional/System/ErrorHandlerTest.php	Modules to enable.
ErrorHandlerTest::assertErrorMessage	function	core/modules/system/tests/src/Functional/System/ErrorHandlerTest.php	Helper function: assert that the error message is found.
ErrorHandlerTest::assertNoErrorMessage	function	core/modules/system/tests/src/Functional/System/ErrorHandlerTest.php	Helper function: assert that the error message is not found.
ErrorHandlerTest::assertNoMessages	function	core/modules/system/tests/src/Functional/System/ErrorHandlerTest.php	Asserts that no messages are printed onto the page.
ErrorHandlerTest::testErrorHandler	function	core/modules/system/tests/src/Functional/System/ErrorHandlerTest.php	Tests the error handler.
ErrorHandlerTest::testExceptionHandler	function	core/modules/system/tests/src/Functional/System/ErrorHandlerTest.php	Tests the exception handler.
errors.inc	file	core/includes/errors.inc	Functions for error handling.
ErrorServiceTestServiceProvider	class	core/modules/system/tests/modules/error_service_test/src/ErrorServiceTestServiceProvider.php
ErrorServiceTestServiceProvider.php	file	core/modules/system/tests/modules/error_service_test/src/ErrorServiceTestServiceProvider.php
ErrorServiceTestServiceProvider::$containerBuilder	property	core/modules/system/tests/modules/error_service_test/src/ErrorServiceTestServiceProvider.php	The in-situ container builder.
ErrorServiceTestServiceProvider::alter	function	core/modules/system/tests/modules/error_service_test/src/ErrorServiceTestServiceProvider.php	Modifies existing service definitions.
ErrorTest	class	core/tests/Drupal/Tests/Core/Utility/ErrorTest.php	@coversDefaultClass \Drupal\Core\Utility\Error[[api-linebreak]] @group Utility
ErrorTest.php	file	core/tests/Drupal/Tests/Core/Utility/ErrorTest.php

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