public Builder clearLevel() {
        if (valueCase_ == 2) {
          valueCase_ = 0;
          value_ = null;
          onChanged();
        }
        return this;
      }
<pre>
Enum representation of confidence.
</pre>

<code>.google.cloud.webrisk.v1.ThreatInfo.Confidence.ConfidenceLevel level = 2;</code>

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