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    {
     "data": {
      "text/plain": [
       "defined class Greeter\n"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "class Greeter(prefix: String, suffix: String) {\n",
    "  def greet(name: String): Unit =\n",
    "    println(prefix + name + suffix)\n",
    "}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Hello, Scala developer!\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "null"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "val greeter = new Greeter(\"Hello, \", \"!\")\n",
    "greeter.greet(\"Scala developer\") // Hello, Scala developer!"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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