/**
 * @fileoverview Factory for creating token and cost estimators.
 *
 * This module provides a factory for creating the appropriate estimator
 * based on the model name or provider.
 */
import { TokenEstimator } from './baseEstimator';
/**
 * Factory for creating token and cost estimators
 */
export declare class EstimatorFactory {
    private static instance;
    /**
     * Get the singleton instance of the factory
     * @returns EstimatorFactory instance
     */
    static getInstance(): EstimatorFactory;
    /**
     * Private constructor to enforce singleton pattern
     */
    private constructor();
    /**
     * Get the appropriate estimator for a given model
     * @param modelName Name of the model
     * @returns TokenEstimator instance
     */
    getEstimatorForModel(modelName: string): TokenEstimator;
    /**
     * Get the estimator for a specific provider
     * @param provider Provider name
     * @returns TokenEstimator instance
     */
    getEstimatorForProvider(provider: string): TokenEstimator;
    /**
     * Get the default estimator
     * @returns TokenEstimator instance
     */
    getDefaultEstimator(): TokenEstimator;
}