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//================================================================================// BASIC UTILITY TYPES
export type Thunk = () => void;export type Callback<T> = (data: T) => void;export type AsyncCallback<T> = (data: T) => Promise<void>;export type SyncOrAsyncCallback<T> = (data: T) => Promise<void> | void;
// The type of a class that implementes interface T.// let arr: ClassThatImplements<IWhatever> = [Whatever1, Whatever2]export type ClassThatImplements<T> = new (...args: any[]) => T;
export enum Cmp {  // this sorts ascendingly  LT = -1,  EQ = 0,  GT = 1,}