# File lib/new_relic/agent/instrumentation/queue_time.rb, line 52
        def timestamp_string_from_header_value(value)
          case value
          when /^\s*([\d+\.]+)\s*$/ then $1
          # following regexp intentionally unanchored to handle
          # (ie ignore) leading server names
          when /t=([\d+\.]+)/       then $1
          end
        end