public Builder clearConfidence() {
      bitField0_ = (bitField0_ & ~0x00000008);
      confidence_ = 0F;
      onChanged();
      return this;
    }
<pre>
Confidence of the OCR results for the word. Range [0, 1].
</pre>

<code>float confidence = 4;</code>

@return This builder for chaining.
java-vision/proto-google-cloud-vision-v1p3beta1/src/main/java/com/google/cloud/vision/v1p3beta1/Word.java