code: Optional[_Code]
 
             @classmethod
-            def from_(cls, value: _MsgTokGuide) -> Self:
-                'Standardize value into .type_, (potentially empty) code.'
-                type_, code = ((value[0], _Code.from_(value[1]))
-                               if isinstance(value, tuple)
-                               else (value, None))
-                return cls(type_, code)
+            def from_(cls, val: _MsgTokGuide) -> Self:
+                'Standardize value into .type_, (potentially empty) .code.'
+                t = ((val[0], _Code.from_(val[1])) if isinstance(val, tuple)
+                     else (val, None))
+                return cls(*t)
 
         self.verb = verb
         self.source = _TokExpectation.from_(source)