import * as L from 'leaflet';
type ScaleFactor = 'scaleFactor1x' | 'scaleFactor2x' | 'scaleFactor4x';
interface GoogleMapTilesOptions {
    apiKey: string;
    mapType?: string;
    language?: string;
    region?: string;
    imageFormat?: string;
    scale?: ScaleFactor;
    highDpi?: boolean;
    layerTypes?: string[];
    overlay?: boolean;
    styles?: Record<string, unknown>[];
    apiOptions?: string[];
    maxZoom?: number;
    minZoom?: number;
    minNativeZoom?: number;
    maxNativeZoom?: number;
    opacity?: number;
    tileSize?: unknown;
    attribution?: unknown;
    bounds?: unknown;
    updateWhenIdle?: boolean;
    updateWhenZooming?: boolean;
    updateInterval?: number;
    className?: string;
    keepBuffer?: number;
    noWrap?: boolean;
    pane?: string;
    zIndex?: number;
    zoomOffset?: number;
    errorTileUrl?: string;
    subdomains?: unknown;
    tms?: boolean;
    detectRetina?: boolean;
    reuseTiles?: boolean;
    [key: string]: unknown;
}
export declare class GoogleMapTilesLayer extends L.GridLayer {
    private readonly apiKey;
    private readonly highDpi;
    private readonly sessionRequest;
    private readonly scaleFactor;
    private sessionToken?;
    private sessionPromise?;
    private sessionRefreshId?;
    private previousViewport?;
    private currentAttribution?;
    private mapInstance?;
    private readonly onMoveEnd;
    constructor(options: GoogleMapTilesOptions);
    onAdd(map: L.Map): this;
    onRemove(map: L.Map): this;
    createTile(coords: L.Coords, done: L.DoneCallback): HTMLElement;
    private ensureSession;
    private startSessionFetch;
    private fetchAndApplySession;
    private scheduleSessionRefresh;
    private clearSessionRefresh;
    private updateAttribution;
    private applyAttribution;
    private removeCurrentAttribution;
    private applyTileSize;
    private parseExpiry;
    private buildTileUrl;
    private mapScaleToFactor;
    private factorToScale;
    private applyInitialGridOptions;
    private setGridOptions;
    private resolveTileSize;
    private redrawLayer;
}
export {};