def get_class_from_parent_subclasses(class_string, parent):
    """
    Search the class string in parent subclasses
    :param class_string: the class name to search
    :param parent: the parent
    :return: the class if found else None
    """
    for found in parent.__subclasses__():
        if found.__name__ == class_string:
            return found
    return None
