private static void AddAsset <T>(IConsole console, string assets, AssetRefList <T> list, ProjectFile pf) where T : Asset
        {
            string[]   assetSplit = assets.Split(',');
            List <int> indices    = new List <int>();

            foreach (string asset in assetSplit)
            {
                int ind = list.FindIndex(asset);
                if (ind == -1)
                {
                    console.Output.WriteLine($"Asset with name \"{asset}\" does not exist; ignoring.");
                }
                else
                {
                    if (list[ind].Asset != null)
                    {
                        if (!console.PromptYesNo($"Asset \"{asset}\" is already in project. Overwrite?"))
                        {
                            continue;
                        }
                    }
                    indices.Add(ind);
                }
            }

            pf.AddAssetsToJSON(list, indices, true);
            pf.SaveAssets(list);
            pf.SaveMain();

            console.Output.WriteLine($"Added {indices.Count} assets.");
        }