<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def gen_lines_from_textfiles( files: Iterable[TextIO]) -> Generator[str, None, None]: """ Generates lines from file-like objects. Args: files: iterable of :class:`TextIO` objects Yields: each line of all the files """

    for file in files:
        for line in file:
            yield line