code: def unroll(self, inputs, state, sequence_length):
      return snt.static_unroll(
          self._net, inputs, state, sequence_length
      )
  
file_path: acme/acme/agents/tf/r2d3/agent_test.py
imports: import acme
  from acme import specs
  from acme.agents.tf import r2d3
  from acme.agents.tf.dqfd import bsuite_demonstrations
  from acme.testing import fakes
  from acme.tf import networks
  import dm_env
  import numpy
  import sonnet
  from absl.testing import absltest
label_desc: Use image node_id 4 for calling the SimpleNetwork obj's underlying member method code with example usage: obj.unroll(inputs, state, sequence_length) and returns: snt