block5.

=== start p.x = 3 ===
setTarget === target -> true
{ key: 'x', value: 3 }
=== end p.x = 3 ===

=== start getting p.x} ===
getting setTarget[x]: 5
=== end getting p.x} ===
p.x: nope

=== start getting p.y} ===
getting setTarget[y]: undefined
=== end getting p.y} ===
p.y: nope

{ x: 5 }