anchor.diff:    ;
   
   stringDeclaration
  -  : STRING Identifier stringInitializer? ';'
  +  : STRING identifier stringInitializer? ';'
     ;
   
   stringInitializer
  
positive.code:   ;
  
  expression
    : qualifiedName
    | literal
    | functionCall
    | assignment
    ;
  
  qualifiedName
    : Identifier ('.' Identifier)*
    ;
  
  literal
  
negative.code:   ;
  
  formalParameter
    : typeName identifier
    ;
  
  block
  