from typing import List


def is_str_in_list_elements(ls_elements: List[str], s_search_string: str) -> bool:
    """delivers true, if one of the strings in the list contains (or is equal) the searchstring

    >>> is_str_in_list_elements([], '')
    False

    >>> is_str_in_list_elements(['abcd', 'def', 1, None], '')
    True

    >>> is_str_in_list_elements(['abcd', 'def', 1, None], 'bc')
    True

    >>> is_str_in_list_elements(['abcd', 'def', 1, None], 'fg')
    False

    """

    if not ls_elements:
        return False

    for s_element in ls_elements:
        if isinstance(s_element, str):
            if s_search_string in s_element:
                return True
    return False