import Sequence from "./Sequence";
export declare class MapNotNull {
    /**
     * Transforms each element into another value by applying the given `transform` function and returns a new sequence.
     * Transformations into `null` values are discarded.
     *
     * @param {(value: T) => R} transform
     * @returns {Sequence<R>}
     */
    mapNotNull<T, R>(this: Sequence<T>, transform: (value: T) => R | null): Sequence<R>;
}