we can put object inside a trait in Scala

object-in-scala-trait

object Dog {
  def bark {
    println("barking")
  }
}

trait Animal {
  object Cat {
    def meow {
      println("meowing")
    }
  }
}

object AnimalLike extends Animal {}

object Main {
  def main(args: Array[String]) {
    Dog.bark
    AnimalLike.Cat.meow
  }
}