import type { ThemeColorScheme, DensityType } from '../../types';
/**
 * Valid icon key values.
 *
 * @type {Set<string>}
 */
export declare const VALID_ICON_KEYS: Set<string>;
/**
 * Validates a color scheme value.
 *
 * @param {string} mode The color scheme to validate.
 * @throws {Error} If the color scheme is invalid.
 * @returns {ThemeColorScheme} The validated color scheme.
 */
export declare function validateColorScheme(mode: string): ThemeColorScheme;
/**
 * Validates and returns a density type.
 *
 * @param {string} type The density type to validate.
 * @throws {Error} If the density type is invalid.
 * @returns {DensityType} The validated density type.
 */
export declare function validateDensityType(type: string): DensityType;
/**
 * Validates the parameters object structure.
 *
 * @param {*} parameters The parameters object to validate.
 * @param {string} context The context name for error messages.
 * @param {object} [options] Validation options.
 * @param {string[]} [options.requiredFields=[]] Array of field names that are required.
 * @throws {Error} If the parameters object structure is invalid.
 */
export declare function validateParams(parameters: unknown, context: string, options?: {
    requiredFields?: string[];
}): void;