async def METHOD_NAME(
    field_set: PythonSourceFieldSet, pex_env: PexEnvironment, python_setup: PythonSetup
) -> RunInSandboxRequest:
    # Unlike for `RunRequest`s, `run_in_sandbox` should _always_ be true when running in the
    # sandbox.
    run_request = await _create_python_source_run_request(
        field_set.address,
        entry_point_field=PexEntryPointField(field_set.source.value, field_set.address),
        pex_env=pex_env,
        run_in_sandbox=True,
    )
    return run_request.to_run_in_sandbox_request()