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@prezly/theme-kit-ui

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import type { ClassNames } from './styling'; type StylingFn<Props extends {}> = (props: Props, ...classNames: ClassNames[]) => string; export type Theme<Element extends string, Props extends {} = {}> = { [E in Element]: StylingFn<Props>; }; type ThemeExtension<Element extends string, Props extends {}> = Partial<{ [E in Element]: ClassNames | ((props: Partial<Props>) => ClassNames); }>; export declare function extendTheme<Element extends string, Props extends {} | never>(theme: Theme<Element, Props>, extension: ThemeExtension<Element, Props>): Theme<Element, Props>; export {};