import type { BoardChange, BoardColumnDef } from './types';
/** What a drop carries: the card that moved, and what it was dropped onto. */
interface DropInput {
    /** `getInitialData` from the dragged card. */
    source: Record<string | symbol, unknown>;
    /** The innermost drop target under the pointer — a card, or a lane. */
    target: Record<string | symbol, unknown> | undefined;
}
/**
 * Turns a drop into the move to report, or `null` when nothing moved.
 *
 * Both steps live in `aim.ts`, shared with the keyboard and with the line drawn
 * during the drag: the target becomes a slot, the slot becomes a change. Having
 * the drop work it out separately is how a board ends up drawing a line in one
 * place and committing a move to another.
 */
export declare function resolveBoardDrop(columns: readonly BoardColumnDef[], { source, target }: DropInput): BoardChange | null;
export {};
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