For comprehension desugaring

example.scala

object ExampleObj {
  val getFirstThing: () => Either[Throwable, String] = () => Left(new Exception("dsa"))
  val getSecondThing: () => Either[Throwable, String] = () => Right("second thing")
  val getThirdThing: () => Either[Throwable, String] = () => Right("third thing")
  
  val result = getFirstThing().flatMap(firstThing => {
    getSecondThing().flatMap(secondThing => {
      getThirdThing().flatMap(thirdThing => {
        Right(thirdThing)
      })
    })
  })
  
  val result = for {
    firstThing <- getFirstThing()
    secondThing <- getSecondThing()
    thirdThing <- getThirdThing()
  } yield {
    thirdThing
  }
}