anchor.diff:  //MethodName         = identifier .
   //InterfaceTypeName  = TypeName .
   interfaceType
  -    : 'interface' '{' ( methodSpec ';'? )* '}'
  +    : 'interface' '{' ( methodSpec eos )* '}'
       ;
   
   //SliceType = "[" "]" ElementType .
  
positive.code:     ;
  
  importDecl
      : 'import' ( importSpec | '(' ( importSpec ';'? )* ')' )
      ;
  
  importSpec
  
negative.code: // Whitespace and comments
  //
  
  WS  :  [ \t]+ -> channel(HIDDEN)
      ;
  
  COMMENT
      :   '/*' .*? '*/' -> channel(HIDDEN)
      ;
  
  TERMINATOR
  	: [\r\n]+ -> channel(HIDDEN)
  	;
  
  
  LINE_COMMENT
      :   '//' ~[\r\n]* -> skip
  