import React from 'react';
export type EventHandlers = Record<string, React.EventHandler<any>>;
export type ObjectType<V = any> = Record<string, V>;
export type HandlerType = Record<string, React.EventHandler<any> | undefined>;
export type AddNoProps<A, B> = Omit<B, keyof A> & A;
export type ValueOf<T> = T[keyof T];
export type ValueItem<Value> = Value extends (infer U)[] ? U : Value;
export type ObjectKey<T = any> = T extends ObjectType ? keyof T & string : never;
export type KeygenResult = string | number;
export type KeygenType<DataItem> = ObjectKey<DataItem> | ((data: DataItem, index?: number) => KeygenResult) | true;
export type StructKeygenType<DataItem> = ObjectKey<DataItem> | ((data: DataItem, index?: number) => KeygenResult);
export type TreeKeygenType<DataItem> = ObjectKey<DataItem> | ((data: DataItem, parentKey: KeygenResult) => KeygenResult);
type OptionalKeys<T> = {
    [K in keyof T]: T extends Record<K, T[K]> ? never : K;
}[keyof T];
type RequiredKeys<T> = Exclude<keyof T, OptionalKeys<T>>;
export type OptionalToRequired<T> = {
    [K in OptionalKeys<T>]-?: T[K] | undefined;
} & {
    [K in RequiredKeys<T>]: T[K];
};
export type StructKeygenStringType<DataItem> = ObjectKey<DataItem> | ((data: DataItem, index: string) => KeygenResult);
export {};
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