import type { Class_DrawingArea } from '../types/DrawingArea';
/**
 * Initially there is only one node per type of exchanges. It must be split to have one import and
 * one export per product (International → InternationalProduct1Importation / …Exportation).
 */
export declare function splitTrade(da: Class_DrawingArea): void;
/** Computes u,v,x and initial y for trade nodes. */
export declare function arrangeTrade(da: Class_DrawingArea, compute_xy: boolean): void;