import type { SpacingTokenWithNone, SpacingToken } from '../types.js';
/**
 * Get css value for spacing token validating 'none'.
 *
 * @param spacing Spacing token or 'none'
 * @param defaultSpacing Default spacing token if the provided spacing is not valid
 * @returns The css value for the spacing token
 */
export declare function toSpacingCSSValue(spacing: SpacingTokenWithNone | undefined, defaultSpacing?: SpacingToken): string;