anchor.diff:    /// See also [isBatchOrWorker].
     final bool isWorker;
   
  -  /// Whether to use the Kernel-based back end for dartdevc.
  -  ///
  -  /// This is always true now and will be removed in a future version.
  -  final bool isKernel;
  -
     /// Whether to re-use the last compiler result when in a worker.
     ///
     /// This is useful if we are repeatedly compiling things in the same context,
  
positive.code:     return ParsedArguments._(newArgs,
          isWorker: isWorker,
          isBatch: isBatch,
          isKernel: isKernel,
          reuseResult: reuseResult,
          useIncrementalCompiler: useIncrementalCompiler);
    }
  
negative.code:         'previousResult requires --batch or --bazel_worker mode/');
    }
  
    return kernel_compiler.compile(args.rest,
        compilerState: previousResult?.kernelState,
        isWorker: args.isWorker,
  