/**
 * Returns the theme name of a given theme name or alias;
 * if there is no corresponding theme name, `'neutral'` is returned.
 *
 * @template { string } T
 * @overload
 * @param { T } theme
 * @returns { InferTheme<T> extends never ? 'neutral' : InferTheme<T> }
 */
export function inferTheme<T extends string>(theme: T): InferTheme<T> extends never ? "neutral" : InferTheme<T>;
/**
 * @overload
 * @param { unknown } theme
 * @returns { Theme }
 *
 * Required for ReturnType<typeof inferTheme> to yield Theme.
 */
export function inferTheme(theme: unknown): Theme;
/**
 * @template { string } T
 * @overload
 * @param { T } value
 * @returns { T extends ThemeAlias ? true : false }
 */
export function isValidTheme<T extends string>(value: T): T extends ThemeAlias ? true : false;
/**
 * @param { 'Button' | 'ToggleButton' } c
 * @param { string } v
 */
export function isValidVariant(c: "Button" | "ToggleButton", v: string): boolean;
/**
 * @typedef { {
 *     <T extends string>(value: T): T extends Radius ? true : false;
 *     (value: string): boolean;
 * } } IsValidRadius
 * @type { IsValidRadius }
 */
export const isValidRadius: IsValidRadius;
/**
 * @typedef { {
 *     <T extends string>(value: T): T extends Size ? true : false;
 *     (value: string): boolean;
 * } } IsValidSize
 * @type { IsValidSize }
 */
export const isValidSize: IsValidSize;
/**
 * @typedef { {
 *     <T extends string>(value: T): T extends Spacing ? true : false;
 *     (value: string): boolean;
 * } } IsValidSpacing
 * @type { IsValidSpacing }
 */
export const isValidSpacing: IsValidSpacing;
/** @type { (value: string) => boolean }  */
export const isValidColor: (value: string) => boolean;
/** @type { (value: string) => boolean }  */
export const isValidPlacement: (value: string) => boolean;
export type IsValidRadius = {
    <T extends string>(value: T): T extends Radius ? true : false;
    (value: string): boolean;
};
export type IsValidSize = {
    <T extends string>(value: T): T extends Size ? true : false;
    (value: string): boolean;
};
export type IsValidSpacing = {
    <T extends string>(value: T): T extends Spacing ? true : false;
    (value: string): boolean;
};
import type { InferTheme } from '#utilities';
import type { Theme } from '#utilities';
import type { ThemeAlias } from '#utilities';
import type { Radius } from '#utilities';
import type { Size } from '#utilities';
import type { Spacing } from '#utilities';
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