import type { Point } from '../types/index.ts';
export interface XYObjectJoinXOptions {
    /**
     * Limit to join the data.
     * @default Number.EPSILON
     */
    xError?: number;
}
/**
 * xyObjectJoinX.
 * @param points - Array of growing points {x,y}.
 * @param options - Options.
 */
export declare function xyObjectJoinX(points: Point[], options?: XYObjectJoinXOptions): Point[];
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