8 files declare their use of DevelGenerateBase

ContentDevelGenerate.php in devel_generate/src/Plugin/DevelGenerate/ContentDevelGenerate.php
devel_generate.module in devel_generate/devel_generate.module
Devel sub-module to for generating content, menus, taxonomy terms etc.
ExampleDevelGenerate.php in devel_generate/tests/modules/devel_generate_example/src/Plugin/DevelGenerate/ExampleDevelGenerate.php
MediaDevelGenerate.php in devel_generate/src/Plugin/DevelGenerate/MediaDevelGenerate.php
MenuDevelGenerate.php in devel_generate/src/Plugin/DevelGenerate/MenuDevelGenerate.php
TermDevelGenerate.php in devel_generate/src/Plugin/DevelGenerate/TermDevelGenerate.php
UserDevelGenerate.php in devel_generate/src/Plugin/DevelGenerate/UserDevelGenerate.php
VocabularyDevelGenerate.php in devel_generate/src/Plugin/DevelGenerate/VocabularyDevelGenerate.php