Review Request 41281: Added output operator to output call/event types in the Executor V1 API.

[Anand Mazumdar]

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https://reviews.apache.org/r/41281/
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Review request for mesos, Ben Mahler and Vinod Kone.


Bugs: MESOS-3550
    https://issues.apache.org/jira/browse/MESOS-3550


Repository: mesos


Description
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See summary.


Diffs
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  include/mesos/v1/executor/executor.hpp 
a052b1016a02a98d55bcb8b9de9b801fa0e42bbd 

Diff: https://reviews.apache.org/r/41281/diff/


Testing
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make check


Thanks,

Anand Mazumdar