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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | 1x 6x 6x 4x 6x | export class StringBuilder {
private readonly stringArray: string[] = [];
public append(string: string): void {
this.stringArray.push(string);
}
public appendLine(string: string): void {
this.stringArray.push(`${string}\n`);
}
public toString(): string {
return this.stringArray.join('');
}
}
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