Original doc: Present the user with a list of choices.
        allow him to select multiple items and return them in a list.
        if the user doesn't choose anything from the list, return the empty list.
        return None if he cancelled selection.

def multchoicebox(message='Pick as many items as you like.', title='', choices=['program logic error - no choices specified']):
    """Original doc: Present the user with a list of choices.
        allow him to select multiple items and return them in a list.
        if the user doesn't choose anything from the list, return the empty list.
        return None if he cancelled selection.
        """
    return psidialogs.multi_choice(message=message, title=title, choices=choices)