import { IMessageBusTopicSubscription } from "@omnia/fx-models";
export interface IVersionPropertyBag {
    /**
    * Returns the value of the key, or null if it does not exist.
    * */
    getValue: <T extends any>(key: string) => T;
    /**
     * Get the value of the specified key if the value does not exists, it uses the supplied factory to create and set the value
     * */
    getOrSetInitialValue: <T extends any>(key: string, initialValueFactory: () => T) => T;
    /**
    * Changes the value of the key
    * */
    setValue: (key: string, value: any) => void;
    /**
     * All keys
     * */
    readonly keys: Array<string>;
    /**
     * Subsctiption on property updated
     * */
    readonly onPropertyUpdated: IMessageBusTopicSubscription<{
        key: string;
        value: any;
    }>;
}