export type Nullable<T> = T | null;
export type Recordable<T = any> = Record<string, T>;
export interface ReadonlyRecordable<T = any> {
  readonly [key: string]: T
}
export type EmitType = (event: string, ...args: any[]) => void;
export interface Fn<T = any, R = T> {
  (...arg: T[]): R
}
export type Promisable<T> = T | Promise<T>;
export type Nullable1<T> = T | null | undefined;
export type Functional<T> = T | ((...args: any[]) => T);
export type DeepPath<T extends object, Prefix extends string = ''> = {
  [K in keyof T & string]: T[K] extends object
    ? `${Prefix}${K}` | DeepPath<T[K], `${Prefix}${K}.`>
    : `${Prefix}${K}`
}[keyof T & string];