Get containing generic types with ClassTag

I know that guava's TypeToken is capable of this:

class C[I, O]    

class A[T] {
  val tok = new TypeToken[T](getClass){}
}

val a = new A[C[Integer, String]]{}
println(a.tok)  // somepackage.C<java.lang.Integer, java.lang.String>

But with scala's ClassTag, I get:

class B[T: ClassTag] {
  // runtime class
  val clazz = implicitly[ClassTag[T]].runtimeClass
  // also tries to construct a guava type token
  val tok = TypeToken.of(clazz).asInstanceOf[TypeToken[T]]
}

val b = new B[C[Integer, String]]
println(b.clazz)  // class somepackage.C
println(b.tok)    // somepackage.C

So with ClassTag, the genetic types contained by C are lost. Is it possible to get somepackage.C with ClassTag or other things in scala?

Thanks!