/**
 * Implement this class-interface to create a custom storage.
 */
export declare abstract class AbstractSecurityStorage {
    /**
     * This method must contain the logic to read the storage.
     *
     * @return The value of the given key
     */
    abstract read(key: string): string | null;
    /**
     * This method must contain the logic to write the storage.
     *
     * @param key The key to write a value for
     * @param value The value for the given key
     */
    abstract write(key: string, value: string): void;
    /**
     * This method must contain the logic to remove an item from the storage.
     *
     * @param key The value for the key to be removed
     */
    abstract remove(key: string): void;
    /**
     * This method must contain the logic to remove all items from the storage.
     */
    abstract clear(): void;
}
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