FIA Serialization:
 $1:FixedIntegerArray{ 5  1  2  3  4  5 } 
$1:[ $0 ]

RPA Serialization:
 $1:ResizablePMCArray{ 3 } 
$1:[ $1  $2:Integer{ 42 }  $3:Hash{ 2  2  -97 }  $0 ]
$2:[ $0 ]
$3:[ fixed_8:ascii:"Hello World"  $2  fixed_8:ascii:"Circular Ref"  $1  $0 ]