Where is pymavlink.tools.mavgen?

[tribbloid]

After upgrading pymavlink to the latest, the script invocation to generate message definition:

dialects=("CS")

for i in "${dialects[@]}"; do
  python -m pymavlink.generator.mavgen --lang="$i" --wire-protocol=2.0 ...

triggered the following warning:

Traceback (most recent call last):
  File "/home/shared/conda/envs/swarm/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/home/shared/conda/envs/swarm/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/home/shared/conda/envs/swarm/lib/python3.10/site-packages/pymavlink/generator/mavgen.py", line 370, in <module>
    raise DeprecationWarning("Executable was moved to pymavlink.tools.mavgen")
DeprecationWarning: Executable was moved to pymavlink.tools.mavgen

But the new file pymavlink.tools.mavgen can't be found anywhere, when I try to invoke it instead, I got the following error:

  python -m pymavlink.tools.mavgen --lang="$i" --wire-protocol=2.0 ...

 Error while finding module specification for 'pymavlink.tools.mavgen' (ModuleNotFoundError: No module named 'pymavlink.tools')

How can I install this module? Is it published in PyPI or conda?