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trait Fun[A, B] { def apply(a: A): B }
abstract class SamImplicitConvert {
class Lst[T]
abstract class Str { def getBytes: Array[Int] }
def flatMap[B](f: Fun[Str, Lst[B]]): List[B] = ???
implicit def conv(xs: Array[Int]): Lst[Int]
def encoded = flatMap (_.getBytes)
}
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