Add LocalIdentifier

Author: f3ath

lib/src/document/local_identifier.dart

@@ -0,0 +1,16 @@
+/// A local Resource Identifier object
+class LocalIdentifier {
+  LocalIdentifier(this.type, this.lid);
+
+  /// Resource type.
+  final String type;
+
+  /// Resource id.
+  final String lid;
+
+  /// Identifier meta-data.
+  final meta = <String, Object?>{};
+
+  Map<String, Object> toJson() =>
+      {'type': type, 'lid': lid, if (meta.isNotEmpty) 'meta': meta};
+}