Implementation of bulk change notifications for ObservableSet and ObservableMap.
------------- Commit messages: - add tests, documentation - Implementation of bulk change listeners for ObservableSet and ObservableMap Changes: https://git.openjdk.org/jfx/pull/1885/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1885&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8367439 Stats: 1193 lines in 13 files changed: 1017 ins; 114 del; 62 mod Patch: https://git.openjdk.org/jfx/pull/1885.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1885/head:pull/1885 PR: https://git.openjdk.org/jfx/pull/1885
