class_docstr: Test cases for tf.strings.lower.
code: def test_string_lower(self):
      strings = ["Pigs on The Wing", "aNimals"]
  
      with self.cached_session():
          output = string_ops.string_lower(strings)
          output = self.evaluate(output)
          self.assertAllEqual(output, [b"pigs on the wing", b"animals"])
  
imports: from tensorflow.python.ops import string_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the StringLowerOpTest obj's underlying member method code with example usage: obj.test_string_lower() without return types