anchor.diff:    if (compPoint < compLine.length) {
       // TODO: ponder smart ways to handle in-line completion
       sublog('cursor is in the middle of the line. NO-OP');
  -    return [];
  +    return const [];
     }
   
     if (providedArgs.isEmpty) {
  
positive.code:             .toList();
        } else if (!option.isFlag) {
          sublog("not providing completions. Wating for option value");
          return [];
        }
      }
    }
  
negative.code:     }
    }
  
    void sublog(Object obj) {
      _log(obj, ['getArgsCompletions']);
    }
  
    sublog("provided args: ${_helpfulToString(providedArgs)}");
    sublog('COMP_LINE:  "$compLine"');
  