import type { ColumnView } from "../../columns/index.js";
import type { PositionGridCell, PositionUnion } from "../../types.js";
import type { DataRect } from "../types.js";
/**
 * Expands the last selection rect toward the start (left in LTR) by one column
 * step from the focused cell position. When `meta` is true the rect jumps to
 * the first visible column. Span roots are respected so the rect always aligns
 * to full cell extents. Returns the updated selections array, or null if no
 * expansion is possible.
 */
export declare function expandRectsStart(scrollIntoView: (params: {
    row?: number;
    column?: number;
}) => void, cellRoot: (row: number, column: number) => PositionUnion | null, selections: DataRect[], meta: boolean, position: PositionGridCell, excludeMarker: boolean, view: ColumnView): DataRect[] | null;