Hi Jeremy, I have revised the spec of ThreadInfo::from to include "since" column: http://cr.openjdk.java.net/~mchung/jdk11/webrevs/8198253/api/java/lang/management/ThreadInfo.html#from(javax.management.openmbean.CompositeData)
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I caught a few other issues like mix-n-match older version of StackTraceElement. If you don't mind, I can take this issue and fix a couple of the interop issues. thanks Mandy
