Github user gemmellr commented on a diff in the pull request: https://github.com/apache/qpid-proton/pull/48#discussion_r36173420 --- Diff: proton-j/src/main/java/org/apache/qpid/proton/engine/Event.java --- @@ -80,15 +83,46 @@ SELECTABLE_WRITABLE, SELECTABLE_EXPIRED, SELECTABLE_ERROR, - SELECTABLE_FINAL + SELECTABLE_FINAL, + + /** + * This value must never be used to generate an event, it's only used as + * a guard when casting custom EventTypes to builtin {@link Type} via + * {@link Event#getBuiltinType()}. + */ + NOT_A_BUILTIN_TYPE; --- End diff -- NOT_A_BUILTIN_TYPE similarly seems a bit off as a name. Perhaps following in the theme of the work, something like EXTENDED, or following the earlier suggestion, NON_CORE, etc? Also, for the javadoc link, the Event#getBuiltinType() method doesnt exist.
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