code: def _vec(x):
      return tf.reshape(x, tf.concat([tf.shape(x)[:-2], [-1]], axis=0))
  
imports: import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import shift
  from tensorflow_probability.python.bijectors import softplus
  from tensorflow_probability.python.bijectors import transform_diagonal
  from tensorflow_probability.python.distributions import matrix_t_linear_operator
  from tensorflow_probability.python.distributions import multivariate_student_t
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 1 for calling a global function with example usage: _vec(x) and returns: tf