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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 combine(path1, path2):
 # type: (Text, Text) -> Text """Join two paths together. This is faster than :func:`~fs.path.join`, but only works when the second path is relative, and there are no back references in either path. Arguments: path1 (str):
 A PyFilesytem path. path2 (str):
 A PyFilesytem path. Returns: str: The joint path. Example: 'foo/bar/baz' """

    if not path1:
        return path2.lstrip()
    return "{}/{}".format(path1.rstrip("/"), path2.lstrip("/"))