public Builder clearCustomAccount() {
        if (customAccountBuilder_ == null) {
          if (authenticationCase_ == 2) {
            authenticationCase_ = 0;
            authentication_ = null;
            onChanged();
          }
        } else {
          if (authenticationCase_ == 2) {
            authenticationCase_ = 0;
            authentication_ = null;
          }
          customAccountBuilder_.clear();
        }
        return this;
      }
<pre>
Authentication using a custom account.
</pre>

<code>
.google.cloud.websecurityscanner.v1alpha.ScanConfig.Authentication.CustomAccount custom_account = 2;
</code>
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1alpha/src/main/java/com/google/cloud/websecurityscanner/v1alpha/ScanConfig.java