code: public com.google.appengine.v1.TrafficSplit getSplit() {
      return split_ == null ? com.google.appengine.v1.TrafficSplit.getDefaultInstance() : split_;
    }
docs: <pre>
  Mapping that defines fractional HTTP traffic diversion to
  different versions within the service.
  </pre>
  
  <code>.google.appengine.v1.TrafficSplit split = 3;</code>