How to get specific stack route params type with React Navigation V5?

I use React Navigation V5. I want to get the params type of specific route. For example, if my StackParamList is:

type StackParamList = { FirstRoute: {  someNumber: number;  someString: number;// etc }}

and assume I want the type of FirstRoute, then the type I want is:

{  someNumber: number;  someString: number;// etc }

Thanks ahead.