How to type a closure?

Question

typescript

There is a type

type changeFormStateHandlerType = (path:string)=>(elem:React.MouseEvent<HTMLButtonElement | HTMLAnchorElement>)=>void;

I need from this type, this piece.

type CustomType = (elem:React.MouseEvent<HTMLButtonElement | HTMLAnchorElement>)=>void;

how to pull it up from the first type, and not produce almost identical types?

Answer 1

type CustomType = ReturnType<changeFormStateHandlerType>

Answer 2

type CustomType and by analogy)