code: def testIsCloudPathS3IsTrue(self):
      self.assertTrue(io_util.IsCloudPath("s3://bucket/foo"))
  
imports: from tensorboard import test
  from tensorboard.util import io_util
label_desc: Use image node_id 2 for calling the IoUtilTest obj's underlying member method code with example usage: obj.testIsCloudPathS3IsTrue() without return types