<itemvalue="A [CollectionReference] object can be used for adding documents, getting [DocumentReference]s, and querying for documents (using the methods inherited from [Query])."/>
<itemvalue="{@template cloud_firestore.collection_reference.doc} Returns a `DocumentReference` with the provided path. If no [path] is provided, an auto-generated ID is used. The unique key generated is prefixed with a client-generated timestamp so that the resulting list will be chronologically-sorted. {@endtemplate}"/>
<itemvalue="The [FirebaseApp] instance to which this [FirebaseDatabase] belongs. If null, the default [FirebaseApp] is used. The [MethodChannel] used to communicate with the native plugin"/>
<itemvalue="get doc by a empty id"/>
@ -53,7 +54,6 @@
<itemvalue="If a [Navigator] is created, at least one of these options must handle the `` route, since it is used when an invalid [initialRoute] is specified on startup (e.g. by another application launching this one with an intent on Android; see [dart:ui.PlatformDispatcher.defaultRouteName])."/>
<itemvalue="The divider's height extent. The divider itself is always drawn as a horizontal line that is centered within the height specified by this value. If this is null, then the [DividerThemeData.space] is used. If that is also null, then this defaults to 16.0."/>
<itemvalue="The thickness of the line drawn within the divider. A divider with a [thickness] of 0.0 is always drawn as a line with a height of exactly one device pixel. If this is null, then the [DividerThemeData.thickness] is used. If that is also null, then this defaults to 0.0."/>
<itemvalue="Used to annotate a field that is allowed to be overridden in Strong Mode. Deprecated: Most of strong mode is now the default in 2.0, but the notion of virtual fields was dropped, so this annotation no longer has any meaning. Uses of the annotation should be removed."/>