import { type DataQuery, type DataSourceApi, type DataSourceInstanceSettings } from '@grafana/data';
export declare function setExpressionDataSourceInstance<TQuery extends DataQuery>(ds: DataSourceApi<TQuery>): void;
export declare function getExpressionDataSourceInstance(): DataSourceApi | undefined;
export declare function getExpressionDataSourceSettings(): DataSourceInstanceSettings | undefined;
export declare function _resetForTests(): void;