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@mui/x-internals

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Utility functions for the MUI X packages (internal use only).

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type CapitalizeFirstLetter<S extends string> = S extends `${infer First}${infer Rest}` ? `${Uppercase<First>}${Rest}` : S; /** * Append string P to all keys in T. * If K is provided, only append P to keys in K. * * @template T - The type to append keys to. * @template P - The string to append. * @template K - The keys to append P to. */ export type AppendKeys<T, P extends string, K extends string = string> = { [key in keyof T as key extends K ? `${key}${CapitalizeFirstLetter<P>}` : key]: T[key] }; export {};