243   class MockSource  class in TestCommonTokenStream
256     @source = MockSource.new
262     @source1 = MockSource.new
263     @source2 = MockSource.new
277     @source = MockSource.new
283     @source = MockSource.new
291     @source = MockSource.new
299     @source = MockSource.new
308     @source = MockSource.new
317     @source = MockSource.new
327     @source = MockSource.new
334     @source = MockSource.new
347     @source = MockSource.new
358     @source = MockSource.new
371     @source = MockSource.new
383     @source = MockSource.new
394     @source = MockSource.new