anchor.diff:    ;
   
   stringDeclaration
  -  : STRING Identifier stringInitializer? ';'
  +  : STRING identifier stringInitializer? ';'
     ;
   
   stringInitializer
  
positive.code:   ;
  
  regexDeclaration
    : REGEX Identifier regexInitializer? ';'
    ;
  
  regexInitializer
  
negative.code:   ;
  
  formalParameter
    : typeName identifier
    ;
  
  block
  