Extracting "Sub" Schema from Schema

const TestSchema = S.Struct({
  data: S.Struct({
    a: S.String()
  })
})


function <SCHEMA extends ??Needs to have a S.Struct with a data field??>doSomething(schema: SCHEMA, event: { body: string }) {
  const data = Schema.decodeUnknown(Schema.parseJson(???schema.data???))(event.body)
  ...
}

doSomething(TestSchema, JSON.stringify({ body: {a: 'test'} }))

const TestSchema = S.Struct({
  data: S.Struct({
    a: S.String()
  })
})


function <SCHEMA extends ??Needs to have a S.Struct with a data field??>doSomething(schema: SCHEMA, event: { body: string }) {
  const data = Schema.decodeUnknown(Schema.parseJson(???schema.data???))(event.body)
  ...
}

doSomething(TestSchema, JSON.stringify({ body: {a: 'test'} }))