code: def _random_visible_including_true(n):
      while True:
          visible = np.random.randint(0, 2, size=n).astype(np.bool)
          if visible.any():
              return visible
  
file_path: chainercv/tests/utils_tests/testing_tests/assertions_tests/test_assert_is_point.py
imports: import numpy
  import unittest
  from chainercv.utils import assert_is_point
  from chainercv.utils import testing
label_desc: Use image node_id 1 for calling a global function with example usage: _random_visible_including_true(n) and returns: visible