def METHOD_NAME(prefix, a):
    for item in a:
        if not is_list(item):
            print prefix, item
        elif item and item[0] == 'al':
            print prefix, 'Subactuator list:'
            for a in item[1:]:
                METHOD_NAME(prefix + '    ', a)
        elif len(item) == 2:
            print prefix, item[0], '=>', item[1]
        elif len(item) == 3 and item[0] == 'prop':
            print prefix, 'Prop', item[1], '=>',
            print item[2]
        else:
            print prefix, '?', item