public Builder mergeVulnerableHeaders(
        com.google.cloud.websecurityscanner.v1.VulnerableHeaders value) {
      if (vulnerableHeadersBuilder_ == null) {
        if (((bitField0_ & 0x00004000) != 0)
            && vulnerableHeaders_ != null
            && vulnerableHeaders_
                != com.google.cloud.websecurityscanner.v1.VulnerableHeaders.getDefaultInstance()) {
          getVulnerableHeadersBuilder().mergeFrom(value);
        } else {
          vulnerableHeaders_ = value;
        }
      } else {
        vulnerableHeadersBuilder_.mergeFrom(value);
      }
      if (vulnerableHeaders_ != null) {
        bitField0_ |= 0x00004000;
        onChanged();
      }
      return this;
    }
<pre>
Output only. An addon containing information about vulnerable or missing HTTP headers.
</pre>

<code>.google.cloud.websecurityscanner.v1.VulnerableHeaders vulnerable_headers = 15;</code>
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1/src/main/java/com/google/cloud/websecurityscanner/v1/Finding.java