/**
 * Open ended enum at runtime
 * @internal
 */
export declare const enum LanguageId {
    Null = 0,
    PlainText = 1
}
/**
 * @internal
 */
export declare class LanguageIdentifier {
    /**
     * A string identifier. Unique across languages. e.g. 'javascript'.
     */
    readonly language: string;
    /**
     * A numeric identifier. Unique across languages. e.g. 5
     * Will vary at runtime based on registration order, etc.
     */
    readonly id: LanguageId;
    constructor(language: string, id: LanguageId);
}
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