@:value(cast "not-allowed")@:impl@:enuminlineread onlyNOT_ALLOWED:MediaKeysRequirement = "not-allowed"
@:value(cast "optional")@:impl@:enuminlineread onlyOPTIONAL:MediaKeysRequirement = "optional"
@:value(cast "required")@:impl@:enuminlineread onlyREQUIRED:MediaKeysRequirement = "required"