import { IControl } from '../interfaces/IControl';
/**
 * Optional interface for Controls that wish to add detail to diagnostic output.
 */
export interface ControlStateDiagramming {
    /**
     * Generates a human-readable representation of the state.
     *
     * @param this - Control
     * @returns Human-readable state
     */
    stringifyStateForDiagram(this: IControl): string;
}
/**
 * Type-guard for the ControlStateDiagramming interface.
 *
 * @param arg - Object to test
 * @returns `true` if the argument implements the `ControlStateDiagramming`
 * interface.
 */
export declare function implementsControlStateDiagramming(arg: any): arg is ControlStateDiagramming;
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