import { Point } from '../..';
import { Stem } from './Stem';
export declare class StemStartPointComparer {
    pivot: Point;
    constructor(p: Point);
    IComparer(i: Stem, j: Stem): number;
    static CompareVectorsByAngleToXAxis(a: Point, b: Point): number;
    private static CompareVectorsPointingToTheSameYHalfPlane;
}