As recommended by the HTTP RFC the max age of a document is defaulted to 10% of the 
document's age at the time it was served based on "Last-Modified". Default expiration dates aren't used for URIs 
containing a query.

 - CallStart
 - **CacheHit**
 - CallEnd
 
### Cache Miss

Under a cache miss the normal request events are seen but an additional event shows the presence of the cache.

        // As recommended by the HTTP RFC and implemented in Firefox, the max age of a document
        // should be defaulted to 10% of the document's age at the time it was served. Default
        // expiration dates aren't used for URIs containing a query.
        val servedMillis = servedDate?.time ?: sentRequestMillis
        val delta = servedMillis - lastModified!!.time
        return if (delta > 0L) delta / 10 else 0L
      }

      return 0L

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// arpa : https://en.wikipedia.org/wiki/.arpa
// Confirmed by registry <******@****.***> 2008-06-18
arpa
e164.arpa
in-addr.arpa
ip6.arpa
iris.arpa
uri.arpa
urn.arpa

// as : https://en.wikipedia.org/wiki/.as
as
gov.as

// asia : https://en.wikipedia.org/wiki/.asia
asia

// at : https://en.wikipedia.org/wiki/.at

2BEC..2BEF    ; valid                  ;      ; NV8    # 8.0  LEFTWARDS TWO-HEADED ARROW WITH TRIANGLE ARROWHEADS..DOWNWARDS TWO-HEADED ARROW WITH TRIANGLE ARROWHEADS
2BF0..2BFE    ; valid                  ;      ; NV8    # 11.0 ERIS FORM ONE..REVERSED RIGHT ANGLE
2BFF          ; valid                  ;      ; NV8    # 12.0 HELLSCHREIBER PAUSE SYMBOL
2C00          ; mapped                 ; 2C30          # 4.1  GLAGOLITIC CAPITAL LETTER AZU