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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _apply_replace_backrefs(m, repl=None, flags=0):
 """Expand with either the `ReplaceTemplate` or compile on the fly, or return None."""


    if m is None:
        raise ValueError("Match is None!")
    else:
        if isinstance(repl, ReplaceTemplate):
            return repl.expand(m)
        elif isinstance(repl, (str, bytes)):
            return _bregex_parse._ReplaceParser().parse(m.re, repl, bool(flags & FORMAT)).expand(m)