code: def assertReachable(self, dep):
      assert not dep.unreachable(
          self.succeeded, self.failed
      ), "Dependency should be reachable"
  
file_path: ipyparallel/ipyparallel/tests/test_dependency.py
imports: import ipyparallel
  from ipyparallel.serialize import can, uncan
  from ipyparallel.util import interactive
  from .clienttest import ClusterTestCase, raises_remote
label_desc: Use image node_id 5 for calling the TestDependency obj's underlying member method code with example usage: obj.assertReachable(dep) without return types