XML plugin

is xml supported by the cmdline converter?

I've tried:

$ pip3 install rows[xml]
...
$ curl 'http://webservices.ingv.it/fdsnws/event/1/query?starttime=2012-05-29T00:00:00&endtime=2012-05-29T23:59:59' > test.xml
$ rows convert test.xml test.json
Traceback (most recent call last):
  File "/home/andy/.local/lib/python3.6/site-packages/rows/utils.py", line 403, in import_from_source
    import_function = getattr(rows, "import_from_{}".format(plugin_name))
AttributeError: module 'rows' has no attribute 'import_from_None'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/andy/.local/bin/rows", line 11, in <module>
    sys.exit(cli())
  File "/usr/lib/python3/dist-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/usr/lib/python3/dist-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/lib/python3/dist-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/lib/python3/dist-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/andy/.local/lib/python3.6/site-packages/rows/cli.py", line 201, in convert
    import_fields=import_fields,
  File "/home/andy/.local/lib/python3.6/site-packages/rows/cli.py", line 73, in _import_table
    **kwargs,
  File "/home/andy/.local/lib/python3.6/site-packages/rows/utils.py", line 424, in import_from_uri
    return import_from_source(source, default_encoding, *args, **kwargs)
  File "/home/andy/.local/lib/python3.6/site-packages/rows/utils.py", line 405, in import_from_source
    raise ValueError('Plugin (import) "{}" not found'.format(plugin_name))
ValueError: Plugin (import) "None" not found

UPDATE: i've checked the code and it seems XML is not currently supported, so i am turning this into a feature request...

Start with the command-line converter path shown in rows/cli.py and the plugin lookup in rows/utils.py. Reproduce the reported rows convert test.xml test.json command, then verify that XML input converts successfully to JSON through the plugin system.