For events that are inner classes (e.g. EventGeneratorLoop$SimpleEvent) jfr tool's 'print' command does not print any information.

Steps to reproduce:
  - use the attached EventGeneratorLoop.java
  - generate a recording: java -XX:StartFlightRecording:dumponexit=true EventGeneratorLoop.java 10
  - use 'jfr summary': observe that the event of interest is part of the summary:
    EventGeneratorLoop$SimpleEvent 10 220
  - attempt to print details for this event: jfr print --events EventGeneratorLoop$SimpleEvent <RECORDING_FILE>
    Nothing is printed
  - also tried to use event's short name (also part of @label annotation):
     jfr print --events SimpleEvent <RECORDING_FILE>
     Does not work
    
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Reproducible: always
Platform agnostic