@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(uri_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 1, uri_);
      }
      if (((bitField0_ & 0x00000001) != 0)) {
        output.writeMessage(2, getResolution());
      }
      if (java.lang.Double.doubleToRawLongBits(alpha_) != 0) {
        output.writeDouble(3, alpha_);
      }
      getUnknownFields().writeTo(output);
    }
<pre>
Target image opacity. Valid values are from  `1.0` (solid, default) to
`0.0` (transparent), exclusive. Set this to a value greater than `0.0`.
</pre>

<code>double alpha = 3;</code>

@return The alpha.
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/Overlay.java