import { DuckDBPreparedStatement } from './DuckDBPreparedStatement';
import { DuckDBPreparedStatementCollection } from './DuckDBPreparedStatementCollection';
export declare class DuckDBPreparedStatementWeakRefCollection implements DuckDBPreparedStatementCollection {
    preparedStatements: WeakRef<DuckDBPreparedStatement>[];
    lastPruneTime: number;
    add(prepared: DuckDBPreparedStatement): void;
    destroySync(): void;
    private prune;
}