/**
 * Build the SVGPath that visually represents the given arrival data.
 * Exported for testing.
 *
 * @param data
 * @return SVGPathElement
 */
export declare function buildPath(data: Arrival): SVGPathElement;
export interface Arrival {
    startAngle: number;
    durationDegrees: number;
}
/**
 * Utility helper function - exported for testing
 */
export declare function arrivalListToString(arrivalList: Arrival[]): string;
/**
 * Utility helper function - exported for testing
 */
export declare function stringToArrivalList(arrivalListStr: string): Arrival[];
/**
 * ArrivalPie custom element
 */
declare class ArrivalPie extends HTMLElement {
    /**
       *  Monitor the 'name' attribute for changes, see:
       *     https://developer.mozilla.org/en-US/docs/Web/Web_Components/Custom_Elements
       */
    static get observedAttributes(): string[];
    get arrivalList(): Arrival[];
    set arrivalList(val: Arrival[]);
    private isInitialized;
    constructor();
    connectedCallback(): void;
    disconnectedCallback(): void;
    attributeChangedCallback(): void;
    /**
       * Rebuild the path elements under the arrpie-pielist group
       * Note: only public to fascilitate testing
       */
    _render(): void;
    private _init;
    /**
       * Render a pie given an string specifying a list of arrivals
       */
    private _renderPie;
}
export default ArrivalPie;