code: public java.lang.String getInstanceClass() {
      java.lang.Object ref = instanceClass_;
      if (ref instanceof java.lang.String) {
        return (java.lang.String) ref;
      } else {
        com.google.protobuf.ByteString bs = 
            (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        instanceClass_ = s;
        return s;
      }
    }
docs: <pre>
  Instance class that is used to run this version. Valid values are:
  * AutomaticScaling: `F1`, `F2`, `F4`, `F4_1G`
  * ManualScaling or BasicScaling: `B1`, `B2`, `B4`, `B8`, `B4_1G`
  Defaults to `F1` for AutomaticScaling and `B1` for ManualScaling or
  BasicScaling.
  </pre>
  
  <code>string instance_class = 7;</code>