JavaScript array empty after push

Question

Hello I have this function which fills an array for me. When I output the array in the for loop it contains elements. However, when I return below with resolve and then call the function and return with then the array seems to be empty.

How can I return this array correctly?

   getUrlsOfFolder(id){
        return new Promise(async (resolve) =>{
            let urls = new Array();
            chrome.bookmarks.getSubTree(id,(searchResult) => {
                for(const key of searchResult){
                    if(key.children){
                        let children = key.children;
                        for(const child of children){
                            if(child.url){
                                urls.push(child.url);
                            }
                        }
                    }
                }
            });
            resolve(urls)
        });
    }