def add_prefix_to_lines(_lines, _prefix):
    """
        add_prefix_to_lines()
        ________________________________________________________________________

        Add a prefix to each line in _lines.

            e.g. : ["abc", "def"] -> ["PREFIXabc", "PREFIXdef"]
        ________________________________________________________________________

        PARAMETERS :
            ▪ _lines        : a list of (str)lines
            ▪ _prefix       : (str)the prefix to be added

        RETURNED VALUE :
            o a list of strings
    """
    res = []
    for line in _lines:
        res.append(_prefix + line)
    return res
