import { TConnectionId } from "../../../store/connection/ConnectionState";
/**
 * Assigns level to each block by BFS from nodes with no incoming edges (roots).
 * Levels are 0-based; roots get 0, their direct successors 1, etc.
 */
export declare function computeLevels(blockIds: TConnectionId[], connections: Array<{
    sourceBlockId: TConnectionId;
    targetBlockId: TConnectionId;
}>): Map<TConnectionId, number>;