export declare abstract class NglDateAdapterBase {
    /**
     * Converts a user supplied string to a `Date` object based on the supplied `format`.
     * If conversion is invalid, it returns `null`.
     */
    abstract parse(value: string, format: string): Date | null;
    /**
     * Converts a `Date` object to the desired `format`.
     */
    abstract format(date: Date, format: string): string;
    /**
     * Converts a pre-defined name or custom format to well valid date pattern.
     */
    abstract pattern(name: 'big-endian' | 'little-endian' | 'middle-endian' | string, delimiter?: string): string;
}