Equivalent of `pipx inject` for asdf-pyapp?

[gwerbin]

Pipx supports the very useful "inject" feature, which allows you to easily pip install additional packages into the environment of a particular Python application, e.g.:

pipx install jupyterlab
pipx inject jupyterlab ipywidgets ipympl

Is this supported at all in the ASDF-PyApp plugin? If not, can it be? Is it even possible to support this, within the ASDF framework?