@java.lang.Override
    public com.google.protobuf.Parser<DetectedLanguage> getParserForType() {
      return PARSER;
    }
<pre>
Confidence of detected language. Range [0, 1].
</pre>

<code>float confidence = 2;</code>

@return This builder for chaining.
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/TextAnnotation.java