code: def setUp(self):
      self.n_anchor_base = 6
      self.feat_stride = 4
      n_fg_class = 4
      self.n_class = n_fg_class + 1
      self.n_roi = 24
      self.roi_size = 21
      self.link = DummyFCIS(
          n_anchor_base=self.n_anchor_base,
          feat_stride=self.feat_stride,
          n_fg_class=n_fg_class,
          n_roi=self.n_roi,
          roi_size=21,
          min_size=600,
          max_size=1000,
      )
  
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 for calling the TestFCIS obj's underlying member method code with example usage: obj.setUp() without return types