8 files declare their use of TagProcessResult in Extensible BBCode 4.0.x

CodeTagPlugin.php in standard/src/Plugin/XBBCode/CodeTagPlugin.php

EntityTagPlugin.php in src/Plugin/XBBCode/EntityTagPlugin.php

NullTagPlugin.php in src/Plugin/XBBCode/NullTagPlugin.php

RenderTagPlugin.php in src/Plugin/RenderTagPlugin.php

TagPluginBase.php in src/Plugin/TagPluginBase.php

TemplateTagPlugin.php in src/Plugin/TemplateTagPlugin.php

XBBCodeFilter.php in src/Plugin/Filter/XBBCodeFilter.php

XBBCodeTestPlugin.php in tests/xbbcode_test_plugin/src/Plugin/XBBCode/XBBCodeTestPlugin.php