anchor.diff:          | K_PER
           | K_PARTITION
           | K_GROUP
  +        | K_TIMEOUT
           ) { $str = $k.text; }
       ;
   
  
positive.code: usingClauseObjective[std::unique_ptr<cql3::attributes::raw>& attrs]
      : K_TIMESTAMP ts=intValue { attrs->timestamp = ts; }
      | K_TTL t=intValue { attrs->time_to_live = t; }
      ;
  
  /**
  
negative.code: 
  K_LIKE:        L I K E;
  
  K_TIMEOUT:     T I M E O U T;
  
  // Case-insensitive alpha characters
  fragment A: ('a'|'A');
  fragment B: ('b'|'B');
  