export function __TS__ArrayConcat(this: T[], ...items: Array): T[] {
const result: T[] = [];
let len = 0;
for (const i of $range(1, this.length)) {
len++;
result[len - 1] = this[i - 1];
}
for (const i of $range(1, items.length)) {
const item = items[i - 1];
if (Array.isArray(item)) {
for (const j of $range(1, item.length)) {
len++;
result[len - 1] = item[j - 1];
}
} else {
len++;
result[len - 1] = item;
}
}
return result;
}