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import scala.collection.mutable.{ Builder, ListBuffer }
object Test {
class Converter[T]
object SimpleIntConverter extends Converter[Int]
class TraversableConverter[T, Coll[X] <: Traversable[X]](converter: Converter[T], builder: Builder[T, Coll[T]]) extends Converter[Coll[T]] {
def convert(x: T): List[T] = List(x)
}
val tc: Converter[List[Int]] = new TraversableConverter(SimpleIntConverter, new ListBuffer[Int])
val tc2 = new TraversableConverter(SimpleIntConverter, new ListBuffer[Int])
def main(args: Array[String]): Unit = {
}
}
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