DSL EXPRESSION:
@v[$2] = $*


AST:
"block" [tt:block] [nt:StatementBlock]
    "=" [tt:equals] [nt:Assignment]
        "[]" [tt:[]] [nt:ArrayOrMapIndexAccess]
            "@v" [tt:oosvar_name] [nt:DirectOosvarValue]
            "$2" [tt:field_name] [nt:DirectFieldValue]
        "$*" [tt:full_srec] [nt:FullSrec]

