StringBuilder import { StringBuilder } from "destack:string"; Mutable UTF-8 string builder with growable backing storage. export class StringBuilder { bytes: Unique<[MaybeUninit]>; initializedLength: usize; capacity: usize; } language/library/src/string/builder.ds:8:17 Members bytes: Unique<[MaybeUninit]> The owned UTF-8 bytes. initializedLength: usize The initialized byte count. capacity: usize The allocated byte capacity.