DSL EXPRESSION:
$["a"] = $["b"]; $["x"] = 10 * $["y"]


AST:
* statement block
    * assignment "="
        * indirect field value "$[]"
            * string literal "a"
        * indirect field value "$[]"
            * string literal "b"
    * assignment "="
        * indirect field value "$[]"
            * string literal "x"
        * operator "*"
            * int literal "10"
            * indirect field value "$[]"
                * string literal "y"

a=pan,b=pan,i=1,x=7.26802863,y=0.72680286
a=pan,b=pan,i=2,x=5.22151108,y=0.52215111
a=wye,b=wye,i=3,x=3.38318526,y=0.33831853
a=wye,b=wye,i=4,x=1.34188743,y=0.13418874
a=pan,b=pan,i=5,x=8.63624470,y=0.86362447
a=pan,b=pan,i=6,x=4.93221287,y=0.49322129
a=zee,b=zee,i=7,x=1.87884919,y=0.18788492
a=wye,b=wye,i=8,x=9.76181386,y=0.97618139
a=wye,b=wye,i=9,x=7.49550760,y=0.74955076
a=wye,b=wye,i=10,x=9.52618360,y=0.95261836
