code: def setUp(self):
      if self.insize == 300:
          self.link = SSD300(n_fg_class=self.n_fg_class)
          self.n_bbox = 8732
      elif self.insize == 512:
          self.link = SSD512(n_fg_class=self.n_fg_class)
          self.n_bbox = 24564
  
file_path: chainercv/tests/links_tests/model_tests/ssd_tests/test_ssd_vgg16.py
imports: import numpy
  import unittest
  import chainer
  from chainer import testing
  from chainer.testing import attr
  from chainercv.links import SSD300
  from chainercv.links import SSD512
label_desc: Use image node_id 1 for calling the TestSSDVGG16 obj's underlying member method code with example usage: obj.setUp() without return types