src/main/java/build/buildfarm/instance/memory/MemoryInstance.java [757:776]:
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    ExecuteOperationMetadata metadata = expectExecuteOperationMetadata(operation);
    Preconditions.checkState(metadata != null, "metadata not found");

    Action action =
        getUnchecked(
            expect(
                metadata.getActionDigest(),
                Action.parser(),
                newDirectExecutorService(),
                RequestMetadata.getDefaultInstance()));
    Preconditions.checkState(action != null, "action not found");

    Command command =
        getUnchecked(
            expect(
                action.getCommandDigest(),
                Command.parser(),
                newDirectExecutorService(),
                RequestMetadata.getDefaultInstance()));
    Preconditions.checkState(command != null, "command not found");
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src/main/java/build/buildfarm/instance/memory/MemoryInstance.java [790:809]:
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      ExecuteOperationMetadata metadata = expectExecuteOperationMetadata(operation);
      Preconditions.checkState(metadata != null, "metadata not found");

      Action action =
          getUnchecked(
              expect(
                  metadata.getActionDigest(),
                  Action.parser(),
                  newDirectExecutorService(),
                  RequestMetadata.getDefaultInstance()));
      Preconditions.checkState(action != null, "action not found");

      Command command =
          getUnchecked(
              expect(
                  action.getCommandDigest(),
                  Command.parser(),
                  newDirectExecutorService(),
                  RequestMetadata.getDefaultInstance()));
      Preconditions.checkState(command != null, "command not found");
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