成员的完整列表，这些成员属于 com.netease.nimlib.sdk.document.DocumentManager,包括所有继承而来的类成员

delete(String id, RequestCallback< Void > callback)	com.netease.nimlib.sdk.document.DocumentManager
getInstance()	com.netease.nimlib.sdk.document.DocumentManager	static
queryDocumentDataList(String marker, int limit, RequestCallback< List< DMData >> callback)	com.netease.nimlib.sdk.document.DocumentManager
querySingleDocumentData(String id, RequestCallback< DMData > callback)	com.netease.nimlib.sdk.document.DocumentManager