/** @public */
export type ExtensionDataValue<TData, TId extends string> = {
    readonly $$type: '@backstage/ExtensionDataValue';
    readonly id: TId;
    readonly value: TData;
};
/** @public */
export type ExtensionDataRef<TData, TId extends string = string, TConfig extends {
    optional?: true;
} = {}> = {
    readonly $$type: '@backstage/ExtensionDataRef';
    readonly id: TId;
    readonly T: TData;
    readonly config: TConfig;
};
/** @public */
export type ExtensionDataRefToValue<TDataRef extends AnyExtensionDataRef> = TDataRef extends ExtensionDataRef<infer IData, infer IId, any> ? ExtensionDataValue<IData, IId> : never;
/** @public */
export type AnyExtensionDataRef = ExtensionDataRef<unknown, string, {
    optional?: true;
}>;
/** @public */
export interface ConfigurableExtensionDataRef<TData, TId extends string, TConfig extends {
    optional?: true;
} = {}> extends ExtensionDataRef<TData, TId, TConfig> {
    optional(): ConfigurableExtensionDataRef<TData, TId, TConfig & {
        optional: true;
    }>;
    (t: TData): ExtensionDataValue<TData, TId>;
}
/** @public */
export declare function createExtensionDataRef<TData>(): {
    with<TId extends string>(options: {
        id: TId;
    }): ConfigurableExtensionDataRef<TData, TId>;
};