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