import { RegressorBase } from '../base';
import { Params } from '../base/estimator';
import type { ExtraTreeRegressorProps } from '../tree/extraTreeRegressor';
export interface ExtraTreesRegressorProps extends ExtraTreeRegressorProps {
    nEstimators?: number;
    bootstrap?: boolean;
    randomState?: number;
}
export declare class ExtraTreesRegressor extends RegressorBase {
    private nEstimators;
    private bootstrap;
    private maxFeatures;
    private randomState?;
    private treeProps;
    private estimators;
    constructor(props?: ExtraTreesRegressorProps);
    getParams(): Params;
    fit(X: number[][], y: number[]): void;
    predict(X: number[][]): number[];
    get featureImportances(): number[];
}