anchor.diff:  :
      CLASS_MAP
      (
  +      TYPE ~NEWLINE
  +   )?
  +   (
         MATCH_ALL
         | MATCH_ANY
  -      | TYPE ~NEWLINE
      )? name = variable NEWLINE s_class_map_tail*
   ;
   
  
positive.code:    | cmm_cos
     | cmm_default_inspection_traffic
     | cmm_dscp
     | cmm_mpls
     | cmm_non_client_nrt
     | cmm_port
     | cmm_qos_group
  ;
  
  
negative.code:    (
        dscp_types += dscp_type
     )+ NEWLINE
  ;
  
  cmm_exception
  :
     EXCEPTION ~NEWLINE+ NEWLINE
  ;
  
  cmm_mpls
  