/**
 * Read a link target without turning an expected filesystem race or an
 * unsupported link shape into a caller-wide failure.
 *
 * A `null` result is deliberately distinct from an empty target string: it
 * means the caller must preserve the link boundary and choose its conservative
 * skip/defer path. Non-filesystem exceptions still propagate so programming
 * errors cannot be mistaken for an unreadable link.
 */
export declare function readlinkOrNull(linkPath: string, readlink?: (path: string) => string): string | null;
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