import { AsyncDuckDB } from './@duckdb/duckdb-wasm';
export declare function getDuckDBInstance(): Promise<AsyncDuckDB> | AsyncDuckDB | null;
export declare function setDuckDBInstance(instance: Promise<AsyncDuckDB> | AsyncDuckDB): void;
export declare function clearDuckDBInstance(): void;
/**
 * Terminate the DuckDB WASM instance (kills the Web Worker + frees WASM memory)
 * and clear the singleton so the next call to getAsyncDuckDb() re-initializes.
 */
export declare function terminateDuckDB(): Promise<void>;