7 files declare their use of OpenlayersLayerInterface in Openlayers 8.4

MapControlFormBase.php in src/Form/MapControlFormBase.php

MapInteractionFormBase.php in src/Form/MapInteractionFormBase.php

MapLayerEditForm.php in src/Form/MapLayerEditForm.php

MapLayerFormBase.php in src/Form/MapLayerFormBase.php

MapStyleEditForm.php in src/Form/MapStyleEditForm.php

MapStyleFormBase.php in src/Form/MapStyleFormBase.php

OpenlayersLayer.php in src/Entity/OpenlayersLayer.php