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      for any such Derivative Works as a whole, provided Your use,
      reproduction, and distribution of the Work otherwise complies with
      the conditions stated in this License.

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      for use, reproduction, or distribution of Your modifications, or
      for any such Derivative Works as a whole, provided Your use,
      reproduction, and distribution of the Work otherwise complies with
      the conditions stated in this License.

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      any Contribution intentionally submitted for inclusion in the Work

      for use, reproduction, or distribution of Your modifications, or
      for any such Derivative Works as a whole, provided Your use,
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      the conditions stated in this License.

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      any Contribution intentionally submitted for inclusion in the Work

    if (throwable instanceof Error) {
      /*
       * TODO(cpovirk): Do we really want to log this if we called setException(throwable) and it
       * returned true? This was intentional (CL 46470009), but it seems odd compared to how we
       * normally handle Error.
       *
       * Similarly, do we really want to log the same Error more than once?
       */
      log(throwable);
    }
  }

      for use, reproduction, or distribution of Your modifications, or
      for any such Derivative Works as a whole, provided Your use,
      reproduction, and distribution of the Work otherwise complies with
      the conditions stated in this License.

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      any Contribution intentionally submitted for inclusion in the Work

      for use, reproduction, or distribution of Your modifications, or
      for any such Derivative Works as a whole, provided Your use,
      reproduction, and distribution of the Work otherwise complies with
      the conditions stated in this License.

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      any Contribution intentionally submitted for inclusion in the Work

      for use, reproduction, or distribution of Your modifications, or
      for any such Derivative Works as a whole, provided Your use,
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      the conditions stated in this License.

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      RunnableExecutorPair(Runnable runnable, Executor executor) {
        this.runnable = runnable;
        this.executor = executor;
      }
    }
  }

  // A version of the list that uses compare and swap to manage the stack without locks.
  @SuppressWarnings({"SunApi", "removal"}) // b/345822163
  private static final class ExecutionListCAS {

reproduction, or distribution of Your modifications, or for any such 
Derivative Works as a whole, provided Your use, reproduction, and 
distribution of the Work otherwise complies with the conditions stated in 
this License. 

5. Submission of Contributions. Unless You explicitly state otherwise, any 
Contribution intentionally submitted for inclusion in the Work by You to the 

                String lastUpdated = versioning.getLastUpdated();
                String now = versioningRef.getLastUpdated();
                if (lastUpdated != null && now != null && now.compareTo(lastUpdated) < 0) {
                    getLogger()
                            .warn("The last updated timestamp in " + metadataFile + " refers to the future (now = "
                                    + now