import type { ChartConfigHandle, ChartConfigType, ECConfig } from '../types.js';
export declare class ChartConfigBuilder {
    #private;
    /**
     * Creates a new handle seeded with an empty chart configuration.
     *
     * @param base The initial config to extend.
     */
    constructor(base?: ECConfig);
    /**
     * Sets the base chart config that subsequent preset calls extend.
     *
     * Calling `baseConfig()` again replaces the previous base config.
     */
    baseConfig(config: ECConfig): ChartConfigHandle;
    /**
     * Returns the composed chart configuration.
     *
     * @returns The final merged ECConfig.
     */
    build(): ECConfig;
}
/**
 * Resolves all supported chart config inputs to a final `ECConfig` object.
 *
 * When the input is a callback, the callback receives a typed handle and can
 * update the config via semantic helper methods.
 *
 * @param input Chart config object or callback handle input.
 * @returns The final chart option object.
 *
 * @example
 * ```ts
 * chart.config = handle => {
 *   handle.baseConfig(baseConfig);
 *   handle.axesShowSplitLines();
 *   handle.axesAddXLabelIcons({ iconUrls, iconPosition: 'top' });
 * };
 * ```
 */
export declare const resolveConfigInput: (input: ChartConfigType) => ECConfig;