model.dart

import 'dart:convert';
Welcome welcomeFromJson(String str) => Welcome.fromJson(json.decode(str));
String welcomeToJson(Welcome data) => json.encode(data.toJson());
class Welcome {
    Welcome({
        this.name,
        this.age,
        this.technology,
    });
String name;
    int age;
    List<Technology> technology;
factory Welcome.fromJson(Map<String, dynamic> json) => Welcome(
        name: json.containsKey("name") && json["name"]!=null ? json["name"] : "",
        age: json.containsKey("age") && json["age"] ? json["age"] : 0,
        technology: json.containsKey("technology") && json["technology"] ? List<Technology>.from(json["technology"].map((x) => Technology.fromJson(x))) : [],
    );
Map<String, dynamic> toJson() => {
        "name": name,
        "age": age,
        "technology": List<dynamic>.from(technology.map((x) => x.toJson())),
    };
}
class Technology {
    Technology({
        this.name,
        this.experience,
    });
String name;
    int experience;
factory Technology.fromJson(Map<String, dynamic> json) => Technology(
        name: json.containsKey("name") && json["name"]!=null ? json["name"] : "",
        experience: json.containsKey("experience") && json["experience"]!=null ? json["experience"] : "",
    );
Map<String, dynamic> toJson() => {
        "name": name,
        "experience": experience,
    };
}