我的编译器一直在说我的toString方法中的“分”超出了范围，但是我不明白为什么这是因为我已经在类中声明了它。

这是我的代码：

{
    "aggregations": {
        "lists": {
            "composite": {
                "sources": [
                    {
                        "parentId": {
                            "terms": {
                                "field": "parentId"
                            }
                        }
                    }
                ],"size": 10000
            },"aggregations": {
                "most_recent": {
                    "max": {
                        "script": {
                            "source": "doc['modifiedOn'].size() == 0 || doc['modifiedOn'].value.millis == null ? doc['createdOn'].value.millis : doc['modifiedOn'].value.millis"
                        }
                    }
                },"most_recent_filter": {
                    "bucket_selector": {
                        "buckets_path": {
                            "modified_on": "most_recent"
                        },"script": "params.modified_on >= 1552003847225L"
                    }
                },"top_items": {
                    "top_hits": {
                        "_source": [                            
                            "parentId","otherFields","createdOn","modifiedOn"
                        ],"sort": {
                            "_script": {
                                "type": "number","script": {
                                    "source": "doc['modifiedOn'].size() == 0 || doc['modifiedOn'].value.millis == null ? doc['createdOn'].value.millis : doc['modifiedOn'].value.millis"
                                },"order": "desc","mode": "max"
                            }
                        },"size": 10
                    }
                }
            }
        }
    },"size": 0
}

}