TS as keyword

type Getters<Type> = {
    [Property in keyof Type as `get${Capitalize<string & Property>}`]: () => Type[Property]
};
 
interface Person {
    name: string;
    age: number;
    location: string;
}
 
type LazyPerson = Getters<Person>;
         
type LazyPerson = {
    getName: () => string;
    getAge: () => number;
    getLocation: () => string;
}

Documentation - Mapped Types

When you don't want to repeat yourself, sometimes a type needs to be based on another type.

https://www.typescriptlang.org/docs/handbook/2/mapped-types.html