/**
 * Merge closing-draft items from multiple sources (the parent closing draft and
 * its closing groups) into one item per SKU, summing the physical counts.
 *
 * Base amounts are summed; measurement amounts are summed per measurement id
 * (not concatenated) because `getCalculatedTotal` reads only the first amount
 * for each measurement id.
 */
export declare function mergeClosingDraftItems(sources: FdoClosingDraftItem[][]): FdoClosingDraftItem[];