anchor.diff:      _checkType(timeoutInMinutes is int, timeoutInMinutes, 'timeout_in_minutes', 'integer');
     }
   
  -  final List<String> capabilities = _validateAndParseCapabilities(taskName, taskYaml['required_agent_capabilities']);
  +  final List<dynamic> capabilities = _validateAndParseCapabilities(taskName, taskYaml['required_agent_capabilities']);
     return new ManifestTask._(
       name: taskName,
       description: taskYaml['description'],
  
positive.code:     final dynamic capability = capabilitiesYaml[i];
      _checkType(capability is String, capability, 'required_agent_capabilities[$i]', 'string');
    }
    return capabilitiesYaml;
  }
  
  void _checkType(bool isValid, dynamic value, String variableName, String typeName) {
  
negative.code:   final String stage;
  
    /// Capabilities required of the build agent to be able to perform this task.
    final List<dynamic> requiredAgentCapabilities;
  
    /// Whether this test is flaky.
    ///
  