golang中的可选类型，如打字稿

In typescript, you can have an optional type like :

interface SquareConfig {
    color?: string;
    width?: number;
}

Is this allowed in Golang? How do I achieve that?

Is this allowed in Golang?

No.

Btw: The language is called "Go".

How do I achieve that?

You do some programming, like using pointers or adding a bool which indicates validity of the fields.