<DataCapture name="DC-multiple-DataCollector">
  <IgnoreUnresolvedVariables>false</IgnoreUnresolvedVariables>
  <ThrowExceptionOnLimit>false</ThrowExceptionOnLimit>

  <Capture>
    <!-- multiple DataCollector -->
    <DataCollector>dc_req_headers_length</DataCollector>
    <DataCollector>dc_req_headers_length2</DataCollector>
    <Collect ref="computed-headers-length" default='0'/>
  </Capture>
</DataCapture>
