Qu: JDK-8247901, Multiple conflicting @return for FlightRecorderMXBean

[Jonathan Gibbons]

I have filed JDK-8247901, to cover an issue detected by doclint, regarding
two conflicting @return descriptions for a single method.

I can make the fix, if you want, but I need confirmation of which one should
be deleted and which should be retained.  I can make an informed guess
(one of them refers to `null` in the context of a `long` return code!)
but I would prefer that someone with domain-specific knowledge make the 
call.

-- Jon

JBS: https://bugs.openjdk.java.net/browse/JDK-8247901

Here, if it helps, is the description from the bug:

doclint reports:
open/src/jdk.management.jfr/share/classes/jdk/management/jfr/FlightRecorderMXBean.java:213: 
warning: @return has already been specified
      * @return a unique ID that can be used for reading recording data.
        ^
1 warning

The source shows:
      * @return a snapshot of all available recording data, not {@code null}
      *
      * @throws java.lang.SecurityException if a security manager exists 
and the
      *         caller does not have {@code ManagementPermission("control")}
      *
      * @return a unique ID that can be used for reading recording data.