anchor.diff:        throw new ArgumentError('Invalid function passed into process');
       }
   
  -    final Callable<T> callable = () => (function is ProjectWithDependenciesFunction
  -        ? function(project, dependencies)
  -        : function(project));
  +    final Callable<T> callable = () =>
  +        (function is ProjectWithDependenciesFunction
  +            ? function(project, dependencies)
  +            : function(project));
   
       try {
         return executeCallable(callable, taskDescription);
  
positive.code:   String toString() => "'$name'";
  
    @override
    ProjectCommand copy(
        {String name,
        CommandConcurrencyMode concurrencyMode,
        Function function,
        Condition condition}) {
      return new _DefaultCommand(
          name != null ? name : this.name,
          function != null ? function : this.function,
          concurrencyMode != null ? concurrencyMode : this.concurrencyMode,
          condition != null ? condition : this.condition);
    }
  }
  
  
negative.code: 
  library jefe.project.commands.core;
  
  import 'dart:async';
  import 'dart:io';
  
  import 'package:jefe/src/project/dependency_graph.dart';
  import 'package:jefe/src/project/project.dart';
  import 'package:jefe/src/project_commands/project_command_executor.dart';
  import 'package:logging/logging.dart';
  
  Logger _log = new Logger('jefe.project.commands.core');
  
  