@staticmethod
def is_s3_uri(uri):
    """
        Checks the uri and determines if it is a valid S3 Uri

        Parameters
        ----------
        uri str, required
            Uri to check

        Returns
        -------
        bool
            Returns True if the uri given is an S3 uri, otherwise False

        """
    return isinstance(uri, str) and uri.startswith('s3://')
