export interface ControlledSignalChangeContext<TReason> {
    readonly reason: TReason;
}
export interface ControlledSignal<TValue, TReason = unknown> {
    readonly value: TValue;
    readonly onChange: (value: TValue, context: ControlledSignalChangeContext<TReason>) => void;
}
/**
 * Describes application-owned state to a chart interaction without creating a
 * second store or subscription lifecycle inside Charts.
 */
export declare function controlledSignal<TValue, TReason = unknown>(value: TValue, onChange: (value: TValue, context: ControlledSignalChangeContext<TReason>) => void): ControlledSignal<TValue, TReason>;