private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.websecurityscanner.v1beta.VulnerableHeaders.Header,
            com.google.cloud.websecurityscanner.v1beta.VulnerableHeaders.Header.Builder,
            com.google.cloud.websecurityscanner.v1beta.VulnerableHeaders.HeaderOrBuilder>
        getMissingHeadersFieldBuilder() {
      if (missingHeadersBuilder_ == null) {
        missingHeadersBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.websecurityscanner.v1beta.VulnerableHeaders.Header,
                com.google.cloud.websecurityscanner.v1beta.VulnerableHeaders.Header.Builder,
                com.google.cloud.websecurityscanner.v1beta.VulnerableHeaders.HeaderOrBuilder>(
                missingHeaders_,
                ((bitField0_ & 0x00000002) != 0),
                getParentForChildren(),
                isClean());
        missingHeaders_ = null;
      }
      return missingHeadersBuilder_;
    }
<pre>
List of missing headers.
</pre>

<code>
repeated .google.cloud.websecurityscanner.v1beta.VulnerableHeaders.Header missing_headers = 2;
</code>
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1beta/src/main/java/com/google/cloud/websecurityscanner/v1beta/VulnerableHeaders.java