/**
 * TTL cache with discrete iterations
 * Keys are stringified using JSON.stringify
 *
 * @template K the key type
 * @template T the value type
 */
export declare class LayoutCache<K, T> {
    readonly maxAge: number;
    /**
     * The cache to use, contains item-age pairs
     */
    private cache;
    /**
     * Creates a new layout cache
     *
     * @param maxAge the time (number of diagram renderings) after which items are removed from the cache
     */
    constructor(maxAge: number);
    /**
     * Starts the next iteration
     */
    nextIteration(): void;
    /**
     * Clears the cache
     */
    clear(): void;
    /**
     * Gets the value if already present, otherwise computes it
     * Also refreshes the time to live of the value
     *
     * @param key the key of the cache entry
     * @param compute the function to compute the value if not present
     * @returns the value
     */
    getOrCompute(key: K, compute: () => T): T;
}
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