export interface OptunaTrialSuggestion {
    trialNumber: number;
    params: Record<string, any>;
}
export declare function optunaInit(storage: string, studyName: string, searchSpace: any[]): Promise<void>;
export declare function optunaAsk(storage: string, studyName: string, n: number): Promise<OptunaTrialSuggestion[]>;
export declare function optunaTell(storage: string, studyName: string, trialNumber: number, score: number | null): Promise<void>;