def in_dir(
    config_dir=os.path.expanduser('~/.tmuxp'), extensions=['.yml', '.yaml', '.json']
):
    """
    Return a list of configs in ``config_dir``.

    Parameters
    ----------
    config_dir : str
        directory to search
    extensions : list
        filetypes to check (e.g. ``['.yaml', '.json']``).

    Returns
    -------
    list
    """
    configs = []

    for filename in os.listdir(config_dir):
        if is_config_file(filename, extensions) and not filename.startswith('.'):
            configs.append(filename)

    return configs
Return a list of configs in ``config_dir``.

    Parameters
    ----------
    config_dir : str
        directory to search
    extensions : list
        filetypes to check (e.g. ``['.yaml', '.json']``).

    Returns
    -------
    list