export type DeepPartial<T> = {
    [K in keyof T]?: DeepPartial<T[K]>;
};
/**
 * Deep-merges plain object branches; non-object values and arrays are
 * replaced wholesale, not merged. `undefined` values in a source skip the
 * key (the target's value is preserved). Returns a new top-level object.
 */
export declare const deepMerge: <T>(target: T, ...sources: Array<DeepPartial<T> | undefined>) => T;
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