As justification for why we should not have this type of logging,
it would scale up to about 13K LOC, 1800 Strings, and 36K (after
pro-guarding - in the case of the demo app) if we did it through
the whole code base*. It makes the code messier to read, and in
most cases doesn't add significant value.
Note: I left the Scheduler logging because it logs interactions
with some awkward library components outside of ExoPlayer, so is
perhaps a bit more justified.
* This is a bit unfair since realistically we wouldn't ever add
lots of logging into trivial classes. But I think it is fair
to say that the deltas would be non-negligible.
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