toJson method
Implementation
Map<String, dynamic> toJson() {
final map = <String, dynamic>{};
map['contact_id'] = contactId;
map['agent_id'] = agentId;
map['full_name'] = fullName;
map['avatar'] = avatar;
map['gender'] = gender;
map['status'] = status;
map['sip_user'] = sipUser;
return map;
}