/**
 * The segments `key` resolves to on the most lenient backend: case-folded, with
 * `\` read as a separator, and empty, `.`, and `..` segments resolved.
 */
export declare const resolvedKeySegments: (key: string) => string[];
/**
 * Whether `key` resolves to `dir` or anywhere beneath it, however it's spelled.
 * Stricter than a string-prefix check on purpose: a false positive only refuses
 * an oddly spelled key, while a miss lets a caller read or write plugin-private
 * storage. An empty `dir` reserves nothing.
 */
export declare const resolvesUnder: (key: string, dir: string) => boolean;
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