feat: use batch download api for create multitasks (#978)

ui/flutter/lib/api/model/create_task_batch.g.dart

@@ -0,0 +1,55 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'create_task_batch.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+CreateTaskBatch _$CreateTaskBatchFromJson(Map<String, dynamic> json) =>
+    CreateTaskBatch(
+      reqs: (json['reqs'] as List<dynamic>?)
+          ?.map((e) => CreateTaskBatchItem.fromJson(e as Map<String, dynamic>))
+          .toList(),
+      opt: json['opt'] == null
+          ? null
+          : Options.fromJson(json['opt'] as Map<String, dynamic>),
+    );
+
+Map<String, dynamic> _$CreateTaskBatchToJson(CreateTaskBatch instance) {
+  final val = <String, dynamic>{};
+
+  void writeNotNull(String key, dynamic value) {
+    if (value != null) {
+      val[key] = value;
+    }
+  }
+
+  writeNotNull('reqs', instance.reqs?.map((e) => e.toJson()).toList());
+  writeNotNull('opt', instance.opt?.toJson());
+  return val;
+}
+
+CreateTaskBatchItem _$CreateTaskBatchItemFromJson(Map<String, dynamic> json) =>
+    CreateTaskBatchItem(
+      req: json['req'] == null
+          ? null
+          : Request.fromJson(json['req'] as Map<String, dynamic>),
+      opts: json['opts'] == null
+          ? null
+          : Options.fromJson(json['opts'] as Map<String, dynamic>),
+    );
+
+Map<String, dynamic> _$CreateTaskBatchItemToJson(CreateTaskBatchItem instance) {
+  final val = <String, dynamic>{};
+
+  void writeNotNull(String key, dynamic value) {
+    if (value != null) {
+      val[key] = value;
+    }
+  }
+
+  writeNotNull('req', instance.req);
+  writeNotNull('opts', instance.opts);
+  return val;
+}