/**
 * Simple LRU cache with TTL support.
 *
 * @template T The type of values stored in the cache
 *
 * @example
 * ```typescript
 * const cache = new LruCache<DescribeSObjectResult>(100, 300000); // 100 items, 5 min TTL
 * cache.set('Account', describeResult);
 * const result = cache.get('Account');
 * ```
 */
export declare class LruCache<T> {
    private readonly cache;
    private readonly maxSize;
    private readonly ttl;
    /**
     * Creates a new LRU cache.
     *
     * @param maxSize - Maximum number of entries (default: 100)
     * @param ttl - Time-to-live in milliseconds (default: 300000 = 5 minutes)
     */
    constructor(maxSize?: number, ttl?: number);
    /**
     * Gets the current number of entries in the cache.
     */
    get size(): number;
    /**
     * Gets a value from the cache if it exists and is not expired.
     *
     * @param key - The cache key
     * @returns The cached value or undefined if not found or expired
     */
    get(key: string): T | undefined;
    /**
     * Sets a value in the cache.
     *
     * @param key - The cache key
     * @param value - The value to cache
     */
    set(key: string, value: T): void;
    /**
     * Checks if a key exists in the cache (and is not expired).
     *
     * @param key - The cache key
     * @returns True if the key exists and is not expired
     */
    has(key: string): boolean;
    /**
     * Deletes an entry from the cache.
     *
     * @param key - The cache key
     * @returns True if the entry was deleted
     */
    delete(key: string): boolean;
    /**
     * Invalidates cache entries matching a pattern.
     *
     * Supports glob-style wildcards: `*` matches any characters.
     * Example: `describe:*` matches all keys starting with "describe:"
     *
     * @param pattern - Optional pattern to match keys. If not provided, clears all entries.
     */
    invalidate(pattern?: string): void;
    /**
     * Clears all entries from the cache.
     */
    clear(): void;
}