[tor-bugs] #20521 [Metrics/metrics-lib]: Deprecate `DescriptorReader.setExcludeFiles()` and add two separate methods for loading and saving a history file

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#20521: Deprecate `DescriptorReader.setExcludeFiles()` and add two separate methods
for loading and saving a history file
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 Reporter:  karsten              |          Owner:  karsten
     Type:  enhancement          |         Status:  new
 Priority:  Medium               |      Milestone:  metrics-lib 1.6.0
Component:  Metrics/metrics-lib  |        Version:
 Severity:  Normal               |     Resolution:
 Keywords:                       |  Actual Points:
Parent ID:                       |         Points:
 Reviewer:                       |        Sponsor:
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Comment (by karsten):

 Hmm, are you sure that the [https://gitweb.torproject.org/user/karsten
 /metrics-
 lib.git/commit/?h=task-20521&id=ad7ab8afe259a7737d90924b6d46e447144a0a6c
 smaller fixes in my branch] are insufficient for Java 7 compatibility?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20521#comment:6>
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