/**
 * Explains the invalid-lock-handle failure of ADT source writes on old BASIS.
 *
 * An ADT write is lock → PUT → unlock, and the lock lives in the stateful
 * ABAP session of the LOCK request. Some BASIS 7.31 systems never hand out a
 * `sap-contextid` cookie, so no stateful ADT session exists and the lock is
 * gone before the PUT arrives. The PUT then fails with HTTP 423
 * ExceptionResourceInvalidLockHandle in every session mode — a client-side
 * header cannot fix it. Without a hint the error reads like a lock held by
 * someone else.
 */
export declare const LEGACY_LOCK_HINT: string;
/** Appends LEGACY_LOCK_HINT to an invalid-lock-handle error on BASIS < 7.40. */
export declare function withLegacyLockHint(text: string): string;
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