code: def unroll(self, inputs, state, sequence_length):
      return snt.static_unroll(
          self._net, inputs, state, sequence_length
      )
  
file_path: acme/acme/agents/tf/r2d2/agent_test.py
imports: import acme
  from acme import specs
  from acme.agents.tf import r2d2
  from acme.testing import fakes
  from acme.tf import networks
  import numpy
  import sonnet
  from absl.testing import absltest
  from absl.testing import parameterized
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