override def +=()

in log4j-api-scala_2.10/src/main/scala/org/apache/logging/log4j/scala/LoggingContext.scala [35:42]


  override def +=(elem1: (String, String), elem2: (String, String), elems: (String, String)*): LoggingContext.this.type = {
    val builder = immutable.Map.newBuilder[String,String]
    builder += elem1
    builder += elem2
    builder ++= elems
    ThreadContext.putAll(builder.result.asJava)
    this
  }