code: def _maybe_static(self, x):
      return tf1.placeholder_with_default(x, shape=None)
  
imports: import collections
  import functools
  import operator
  from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v1
  import tensorflow.compat.v2
  from tensorflow_probability.python.distributions import uniform
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.math import gradient
  from tensorflow_probability.python.math.scan_associative import scan_associative
label_desc: Use image node_id 1 for calling the ScanAssociativeTestDynamic obj's underlying member method code with example usage: obj._maybe_static(x) and returns: tf1