lib/models没有生成文件

[jinlu2010]

执行flutter packages pub run json_model后，lib/models并没有生成文件

PS E:\AndroidStudio\github_client_app> flutter packages pub run json_model
Unhandled exception:
FormatException: Unexpected character (at line 2, character 18)
"enable":true, // 是否启用缓存
^

#0 _ChunkedJsonParser.fail (dart:convert-patch/convert_patch.dart:1405:5)
#1 _ChunkedJsonParser.parse (dart:convert-patch/convert_patch.dart:935:48)
#2 _parseJson (dart:convert-patch/convert_patch.dart:40:10)
#3 JsonDecoder.convert (dart:convert/json.dart:506:36)
#4 JsonCodec.decode (dart:convert/json.dart:157:41)
#5 generateModelClass. (file:///D:/flutter/.pub-cache/hosted/pub.flutter-io.cn/json_model-1.0.0/bin/json_model.dart:83:24)
#6 List.forEach (dart:core-patch/growable_array.dart:410:8)
#7 generateModelClass (file:///D:/flutter/.pub-cache/hosted/pub.flutter-io.cn/json_model-1.0.0/bin/json_model.dart:71:12)
#8 main (file:///D:/flutter/.pub-cache/hosted/pub.flutter-io.cn/json_model-1.0.0/bin/json_model.dart:46:14)
#9 _delayEntrypointInvocation. (dart:isolate-patch/isolate_patch.dart:295:32)
#10 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:192:12)
pub finished with exit code 255