Pass error to svelte using a struct

...a very cursed struct

frontend/wailsjs/go/main/App.d.ts

@@ -2,4 +2,4 @@
 // This file is automatically generated. DO NOT EDIT
 import {main} from '../models';
 
-export function GetFood():Promise<Array<main.Food>>;
+export function GetFood():Promise<main.WailsFood>;

frontend/wailsjs/go/models.ts

@@ -1,7 +1,13 @@
 export namespace main {
 	
 	export class Food {
-	
+	    rowid: number;
+	    date: string;
+	    food: string;
+	    description: string;
+	    amount: number;
+	    per100: number;
+	    energy: number;
 	
 	    static createFrom(source: any = {}) {
 	        return new Food(source);
@@ -9,9 +15,49 @@ export namespace main {
 	
 	    constructor(source: any = {}) {
 	        if ('string' === typeof source) source = JSON.parse(source);
-	
+	        this.rowid = source["rowid"];
+	        this.date = source["date"];
+	        this.food = source["food"];
+	        this.description = source["description"];
+	        this.amount = source["amount"];
+	        this.per100 = source["per100"];
+	        this.energy = source["energy"];
 	    }
 	}
+	export class WailsFood {
+	    data: Food[];
+	    success: boolean;
+	    error?: string;
+	
+	    static createFrom(source: any = {}) {
+	        return new WailsFood(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.data = this.convertValues(source["data"], Food);
+	        this.success = source["success"];
+	        this.error = source["error"];
+	    }
+	
+		convertValues(a: any, classs: any, asMap: boolean = false): any {
+		    if (!a) {
+		        return a;
+		    }
+		    if (a.slice && a.map) {
+		        return (a as any[]).map(elem => this.convertValues(elem, classs));
+		    } else if ("object" === typeof a) {
+		        if (asMap) {
+		            for (const key of Object.keys(a)) {
+		                a[key] = new classs(a[key]);
+		            }
+		            return a;
+		        }
+		        return new classs(a);
+		    }
+		    return a;
+		}
+	}
 
 }