9 files declare their use of Yaml in Database Sanitize 7

DatabaseSanitizeTest.php in drush/tests/DatabaseSanitizeTest.php

database_sanitize.inc in inc/database_sanitize.inc

DumperTest.php in vendor/symfony/yaml/Tests/DumperTest.php

InlineTest.php in vendor/symfony/yaml/Tests/InlineTest.php

LintCommand.php in vendor/symfony/yaml/Command/LintCommand.php

MergeYaml.php in vendor/edisonlabs/merge-yaml/src/MergeYaml.php

MergeYamlTest.php in vendor/edisonlabs/merge-yaml/tests/src/Unit/MergeYamlTest.php

ParserTest.php in vendor/symfony/yaml/Tests/ParserTest.php

YamlTest.php in vendor/symfony/yaml/Tests/YamlTest.php