anchor.diff:      ;
   
   block
  -    : '{' statementList? '}'
  -    ;
  -
  -statementList
  -    : statement+
  +    : '{' statement* '}'
       ;
   
   variableStatement
  
positive.code: 
  tjsSetter
      : Setter '(' functionParameters? ')' '{' functionBody '}'
      ;
  
  methodDefinition
      : propertyName '(' functionParameters? ')' '{' functionBody '}'
      ;
  
  functionParameters
  
negative.code: }
  
  program
      : statement* EOF
      ;
  
  statement
  