const { myMethod } = something[0].play;
how can I cast myMethod to string?
this won't work
const { myMethod } = something[0].play as string;
If myMethod is assignable to type 'string':
const { myMethod }: { myMethod: string } = something[0].play;
Otherwise you have to cast it at the cost of not destructuring:
const myMethod = something[0].play.myMethod.toString();
// or
const myMethod = String(something[0].play.myMethod);