this implicit works for scala

gistfile1.scala

package com.github.notyy.retroboard.util

import org.scalatest.FunSpec
import org.scalatest.matchers.ShouldMatchers

trait Base {
  protected def getChildren: List[String]
}

object Base {
  implicit class SBase[T <: Base](child: T) {
    def apply = child.getChildren
  }
}

class Child1 extends Base {
  protected def getChildren: List[String] = List("child1")
}

class Child2 extends Base {
  def getChildren: List[String] = List("child2")
}

class InheritenceSpec extends FunSpec with ShouldMatchers {
  describe("SBase") {
    it("should add apply method to all children of Base") {
      println(new Child1().apply)
      println(new Child2().apply)
    }
  }
}