'Checks if the extension can run in the current environment.
Dependencies described by :file:`setup.py` are checked by Mopidy, so
you should not check their presence here.
If a problem is found, raise :exc:`~mopidy.exceptions.ExtensionError`
with a message explaining the issue.
:raises: :exc:`~mopidy.exceptions.ExtensionError`
:returns: :class:`None`'

def validate_environment(self):

    pass
