import { DynamicValue, Listener, Unsubscriber } from "./DynamicValue";
/**
 * A [[DynamicValue]] that holds a constant `number` value
 */
export declare class NumberValue implements DynamicValue<number> {
    __variant__: string;
    input: number;
    name: string | void;
    constructor(input: number, name?: string);
    onValue(listener: Listener<number>): Unsubscriber;
    getValue(): Promise<number>;
    static fromJSON(json: {
        input: number;
        name?: string;
    }): NumberValue;
}