gistfile1.scala

    def generate(fragments: List[PageFragment]):Unit = {
      val (imports, others) = fragments.partition(isImportStatement)
      imports.foreach{ generate(_) }
      others.foreach{ generate(_) }
    }

    def isImportStatement(fragment: PageFragment) = fragment match {
      case s: ScriptletFragment if (s.code.trim.startsWith("import ")) => true
      case _ => false
    }