import type { DataXY, NumberArray } from 'cheminfo-types';
/**
 * Order object of array, x has to be monotone. Ensure x is growing
 * @param data - object of kind {x:[], y:[]}.
 * @returns data with x in ascending order (reversed in-place if descending).
 */
export declare function xyGrowingX<DataType extends NumberArray = NumberArray>(data: DataXY<DataType>): DataXY<DataType>;
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