import * as React from 'react';
/**
 * @hidden
 */
export interface DropClueState {
    visible: boolean;
    top: number;
    left: number;
    height: number;
}
/**
 * @hidden
 */
export declare class DropClue extends React.PureComponent<{}, DropClueState> {
    readonly state: DropClueState;
    render(): JSX.Element;
}