/**
 * A string always representing a class name, undefined does nothing, and an
 * object represents conditional class names. The keys are the class names, and
 * the values are truthy/falsy values for if we should include them.
 */
export type ClassValue = string | undefined | Record<string, any>;
/**
 * Utility function to conditionally join `classNames` together. Returns
 * undefined if no classes are provided.
 */
export declare const css: (...args: ClassValue[]) => string | undefined;
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