import type { ChartDatapoint } from '../../../core/types/chart-data.js';
type OrderingAccessors = {
    spanIdAccessor: string;
    parentIdAccessor: string;
    x0Accessor: string;
    x1Accessor: string;
};
/**
 * Traverses the span forest in DFS pre-order (parent before children, siblings
 * sorted by `x0` with original index as tie-breaker) and returns a flat list
 * where each span carries its `depth`. Zero-width spans are widened by 1 so
 * they remain paintable on the canvas.
 *
 * Numeric x0/x1 are parsed once per span and cached on the internal `Entry`,
 * so the sort comparator does not re-run `Number()` at every comparison.
 * Traversal is iterative to avoid stack overflows on deep flame graphs.
 */
export declare function orderSpansHierarchically(spans: ChartDatapoint[], { spanIdAccessor, parentIdAccessor, x0Accessor, x1Accessor, }: OrderingAccessors): ChartDatapoint[];
export {};
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