code: def __init__(self, n_anchor_base, n_roi):
      super(DummyRegionProposalNetwork, self).__init__()
      self.n_anchor_base = n_anchor_base
      self.n_roi = n_roi
  
imports: import numpy
  import unittest
  import chainer
  from chainer import testing
  from chainer.testing import attr
  from chainercv.experimental.links.model.fcis import FCIS
  from chainercv.utils import assert_is_instance_segmentation_link
  from chainercv.utils import generate_random_bbox
label_desc: Use image node_id 1 to create a new DummyRegionProposalNetwork object from inherited base classes: chainer with example: obj = DummyRegionProposalNetwork(n_anchor_base, n_roi)