code: def test_extract_ext():
      fdict = tvm._ffi.registry.extract_ext_funcs(
          tvm_ext._LIB.TVMExtDeclare
      )
      assert fdict["mul"](3, 4) == 12
  
file_path: tvm/apps/extension/tests/test_ext.py
imports: import tvm_ext
  import tvm
  import tvm._ffi.registry
  import tvm.testing
  from tvm import te
  import numpy
label_desc: Use image node_id 5 for calling a global function with example usage: test_extract_ext() without return types