export declare class SnippetString {
    static isSnippetString(thing: unknown): thing is SnippetString;
    private static _escape;
    private _tabstop;
    value: string;
    constructor(value?: string);
    appendText(string: string): SnippetString;
    appendTabstop(number?: number): SnippetString;
    appendPlaceholder(value: string | ((snippet: SnippetString) => unknown), number?: number): SnippetString;
    appendChoice(values: string[], number?: number): SnippetString;
    appendVariable(name: string, defaultValue?: string | ((snippet: SnippetString) => unknown)): SnippetString;
}
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