class_docstr: Simple Reducer that just keeps track of the last sample.
class_docstr_tok: ["Simple","Reducer","that","just","keeps","track","of","the","last","sample","."]
code: def one_step(
      self,
      new_chain_state,
      current_reducer_state,
      previous_kernel_results,
  ):
      return new_chain_state
  
imports: import collections
  import tensorflow.compat.v2
  from tensorflow_probability.python.experimental.mcmc import reducer
  from tensorflow_probability.python.mcmc import kernel
  from tensorflow_probability.python.random import random_ops
label_desc: Use image node_id 2 for calling the TestReducer obj's underlying member method code with example usage: obj.one_step(new_chain_state, current_reducer_state, previous_kernel_results) and returns: new_chain_state