code: def test_list_provisioners_app():
      app = ListProvisioners()
      app.initialize([])
      app.start()
  
imports: import os
  import warnings
  from jupyter_client.kernelspecapp import InstallKernelSpec, KernelSpecApp, ListKernelSpecs, ListProvisioners, RemoveKernelSpec
label_desc: Use image node_id 3 for calling a global function with example usage: test_list_provisioners_app() without return types