case class AOpsLow(a: A) {
 def foo: String = "low"
}
case class AOpsHigh(a: A) {
 def foo: String = "high"
}
trait LowPriorityImplicits {
 implicit def lowPriorityOps(a: A): AOpsLow = AOpsLow(a)
}
class A
object A extends LowPriorityImplicits {
 implicit def highPriorityOps(a: A): AOpsHigh = AOpsHigh(a)
}
println(A().foo) // prints "high"

class LowPriorityOps {
 extension(a: A)
 def foo: String = "low"
}
trait LowPriorityImplicits {
 given LowPriorityOps = LowPriorityOps()
}
class A
object A extends LowPriorityImplicits {
 extension(a: A)
 def foo: String = "high"
}
println(A().foo) // Note that implicit extension methods cannot be applied because they are ambiguous;