save before flutter upgrade

lib/models/customers/heatmap_customer_model.dart

@@ -0,0 +1,57 @@
+import 'dart:convert';
+
+class HeatmapCustomers {
+    int? year;
+    int? month;
+    Registro? registro;
+
+    HeatmapCustomers({
+        this.year,
+        this.month,
+        this.registro,
+    });
+
+    factory HeatmapCustomers.fromJson(String str) => HeatmapCustomers.fromMap(json.decode(str));
+
+    String toJson() => json.encode(toMap());
+
+    factory HeatmapCustomers.fromMap(Map<String, dynamic> json) => HeatmapCustomers(
+        year: json["year"],
+        month: json["month"],
+        registro: json["registro"] == null ? null : Registro.fromMap(json["registro"]),
+    );
+
+    Map<String, dynamic> toMap() => {
+        "year": year,
+        "month": month,
+        "registro": registro?.toMap(),
+    };
+}
+
+class Registro {
+    double? leads;
+    double? total;
+    double? actives;
+
+    Registro({
+        this.leads,
+        this.total,
+        this.actives,
+    });
+
+    factory Registro.fromJson(String str) => Registro.fromMap(json.decode(str));
+
+    String toJson() => json.encode(toMap());
+
+    factory Registro.fromMap(Map<String, dynamic> json) => Registro(
+        leads: json["Leads"],
+        total: json["Total"],
+        actives: json["Actives"],
+    );
+
+    Map<String, dynamic> toMap() => {
+        "Leads": leads,
+        "Total": total,
+        "Actives": actives,
+    };
+}