/** A predicate testing a key against `glob` using standard glob semantics. */
export declare const globMatcher: (glob: string, caseInsensitive: boolean) => ((key: string) => boolean);
/**
 * The literal key prefix every match must start with — picomatch's scanned
 * `base` — used to push a `prefix` down to `listAll` so a search doesn't walk
 * the whole bucket. Empty for a negated pattern (matches by exclusion, so no
 * usable prefix) or one that opens with a wildcard.
 *
 * - `uploads/2024/*.pdf` → `uploads/2024`
 * - `logs/app*.log` → `logs`
 * - `invoices/**` → `invoices`
 * - `*.pdf`, `!keep.txt` → `""`
 * - `a/b/c` → `a/b/c` (no wildcard: the whole key is literal)
 */
export declare const globPrefix: (glob: string) => string;
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