def parser(_, parts, skip=False, **kwargs):
    """ Parses the pipe content

    Args:
        _ (dict): The item (ignored)
        parts (List[str]): The content to concatenate
        skip (bool): Don't parse the content
        kwargs (dict): Keyword arguments

    Kwargs:
        stream (dict): The original item

    Returns:
        str: The concatenated string

    Examples:
        >>> parser(None, ['one', 'two']) == 'onetwo'
        True
    """
    if skip:
        parsed = kwargs['stream']
    else:
        parsed = ''.join(str(p) for p in parts if p)

    return parsed