code: def get_example(self, i):
      if self.color:
          img = np.random.randint(0, 256, size=(3, 48, 64))
      else:
          img = np.random.randint(0, 256, size=(1, 48, 64))
      label = np.random.randint(0, 20, dtype="i")
      return (img, label) + self.options
  
imports: import numpy
  import unittest
  from chainer.dataset import DatasetMixin
  from chainer import testing
  from chainercv.utils import assert_is_label_dataset
label_desc: Use image node_id 3 for calling the LabelDataset obj's underlying member method code with example usage: obj.get_example(i) and returns: unknown