/**
 * Advanced TypeScript spacing calculator with conditional return type
 * Uses conditional types to automatically infer the return type
 * based on the withPx parameter, without using 'any' type
 */
/**
 * Defines the return type based on the withPx parameter
 */
type SpacingResult<T extends boolean> = T extends true ? string : number;
/**
 * Calculates spacing value based on a step number with dynamic return type
 * @param step - The step in the spacing scale (1, 2, 3, etc.)
 * @param withPx - When true, returns string with 'px' suffix; when false, returns number
 * @returns Either a number or a string with 'px' suffix based on withPx parameter
 */
export declare function generateSpacingSize<T extends boolean = false>(step: number, withPx?: T): SpacingResult<T>;
export {};