anchor.diff:      ;
   
   arrayInitializer
  -    :   LBRACE nls variableInitializers? nls RBRACE
  +    :   LBRACE nls (variableInitializers nls)? RBRACE
       ;
   
   /**
  
positive.code:     ;
  
  switchStatement
      :   SWITCH expressionInPar nls LBRACE nls switchBlockStatementGroup* nls RBRACE
      ;
  
  loopStatement
  
negative.code: 
          (
              { 3 != $t }?
              (typeParameters nls)?
              (
                  { 2 != $t }?
                  (EXTENDS nls
  