def METHOD_NAME(
    filenames,
    missing: Optional[List[bool]] = None,
    path_prefix_conversions: Optional[Dict[Text, Text]] = None,
):
    if path_prefix_conversions is None:
        path_prefix_conversions = util.get_config_yaml("path_prefixes.yaml")
    if path_prefix_conversions is None:
        return
    for i, filename in enumerate(filenames):
        if missing is not None:
            if not missing[i]:
                continue
        elif os.path.exists(filename):
            continue
        for old_prefix, new_prefix in path_prefix_conversions.items():
            if filename.startswith(old_prefix):
                try_filename = filename.replace(old_prefix, new_prefix)
                try_filename = fix_path_separator(try_filename)
                if os.path.exists(try_filename):
                    filenames[i] = try_filename
                    if missing is not None:
                        missing[i] = False
                    continue