public Builder setThreatJustification(
        com.google.webrisk.v1.ThreatInfo.ThreatJustification value) {
      if (threatJustificationBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        threatJustification_ = value;
      } else {
        threatJustificationBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
<pre>
Context about why the URI is unsafe.
</pre>

<code>.google.cloud.webrisk.v1.ThreatInfo.ThreatJustification threat_justification = 3;
</code>
java-webrisk/proto-google-cloud-webrisk-v1/src/main/java/com/google/webrisk/v1/ThreatInfo.java