DSL EXPRESSION:
nr=NR; $nr=nr


AST:
"block" [tt:block] [nt:StatementBlock]
    "=" [tt:equals] [nt:Assignment]
        "nr" [tt:non_sigil_name] [nt:LocalVariable]
        "NR" [tt:ctx_NR] [nt:ctx_NR]
    "=" [tt:equals] [nt:Assignment]
        "$nr" [tt:field_name] [nt:DirectFieldValue]
        "nr" [tt:non_sigil_name] [nt:LocalVariable]

