anchor.diff:  postfixExpression
   	:	primaryExpression // start with a primary
   
  -		(	// qualified id (id.id.id.id...) -- build the name
  +		(options{warnWhenFollowAmbig=false;} : 	// qualified id (id.id.id.id...) -- build the name
   			DOT^
   			( (typeArguments[false])?
   			  ( IDENT
  
positive.code: // boolean relational expressions (level 5)
  relationalExpression
  	:	shiftExpression ( "instanceof"^ typeSpec[true])?
  		(	(	(	LT^
  				|	GT^
  				|	LE^
  				|	GE^
  
negative.code: // A (possibly-qualified) java identifier.  We start with the first IDENT
  //   and expand its name by adding dots and following IDENTS
  identifier
  	:	IDENT  (options{warnWhenFollowAmbig=false;}: DOT^ IDENT )*
  	;
  
  identifierStar
  