//Inside project A
trait X

class A
  extends X //commenting this line affacting ClassAsGenericBoundUsage on X

//Inside project B that depends on A
class B {
  def foo: Option[X] = None //this has ClassAsGenericBoundUsage on X
}

//Inside project C that depends on A
class C {
  def foo: X = ??? //this hasn't got ClassAsGenericBoundUsage on X
}