Observations

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def retrieveProps(c: Container, file: String) {
  val prop = new {
    def apply(key: String) = c.getPropertyOrFail(key,
      throw new IllegalArgumentException(
         "missing " + key + " in " + file)).getValue
  }

  val name = prop("username")
  val pass = prop("password")
  val db   = prop("database")
}