'Set owner of a file or directory.
If either parameter \'owner\' or \'group\' is set to null, that
parameter is left unchanged.
Parameters \'owner\' and \'group\' cannot be both null.
Parameters:
- ctx
- path: Path to the file or directory
- owner: New owner.
- group: New group.'

def chown(self, ctx, path, owner, group):

    self.send_chown(ctx, path, owner, group)
    self.recv_chown()
