export declare class CodeBuilder {
    private readonly indentStr;
    private parts;
    private currentIndent;
    private readonly indentStack;
    private atLineStart;
    constructor(indentStr?: string);
    private addPart;
    add(part: string): this;
    addIf(cond: boolean, part: string): this;
    space(): this;
    apply<T>(callback: (code: CodeBuilder, node: T) => void, node: T): this;
    applyOpt<T>(callback: (code: CodeBuilder, node: T) => void, node: undefined | T): this;
    newLine(): this;
    newLines(count: number): this;
    indent(): this;
    dedent(): this;
    indentCustom(len: number): this;
    lineLength(): number;
    trimNewlines(): this;
    toString(): string;
}