code: def testRemovePrefix(self, op):
      values = ["a:foo", "a:bar", "a:foo", "b:baz", "b:qux", "ca:b"]
      with self.cached_session():
          input_vector = constant_op.constant(values, dtypes.string)
          stripped = op(
              input_vector, "^(a:|b:)", "", replace_global=False
          )
          self.assertAllEqual(
              [b"foo", b"bar", b"foo", b"baz", b"qux", b"ca:b"],
              stripped,
          )
  
imports: from absl.testing import parameterized
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import gen_string_ops
  from tensorflow.python.ops import string_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 2 for calling the RegexReplaceOpVariantsTest obj's underlying member method code with example usage: obj.testRemovePrefix(op) without return types