import { AnyExtensionDataMap } from './createExtension';
/** @public */
export interface ExtensionInput<TExtensionData extends AnyExtensionDataMap, TConfig extends {
    singleton: boolean;
    optional: boolean;
}> {
    $$type: '@backstage/ExtensionInput';
    extensionData: TExtensionData;
    config: TConfig;
}
/** @public */
export declare function createExtensionInput<TExtensionData extends AnyExtensionDataMap, TConfig extends {
    singleton?: boolean;
    optional?: boolean;
}>(extensionData: TExtensionData, config?: TConfig): ExtensionInput<TExtensionData, {
    singleton: TConfig['singleton'] extends true ? true : false;
    optional: TConfig['optional'] extends true ? true : false;
}>;