anchor.diff:  // Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
   // for details. All rights reserved. Use of this source code is governed by a
   // BSD-style license that can be found in the LICENSE file.
  -
  -// @dart = 2.9
   
   /// Command line entry point for Dart Development Compiler (dartdevc), used to
   /// compile a collection of dart libraries into a single JS module
  
positive.code:       output.writeln(message.toString());
      }));
      return WorkResponse()
        ..exitCode = lastResult.success ? 0 : 1
        ..output = output.toString();
    }
  }
  
negative.code: 
    /// Keeps track of our last compilation result so it can potentially be
    /// re-used in a worker.
    CompilerResult? lastResult;
  
    /// Performs each individual work request.
    @override
  