def get_usage(self, ctx):
        """Formats the usage line into a string and returns it.

        Calls :meth:`format_usage` internally.
        """
        formatter = ctx.make_formatter()
        self.format_usage(ctx, formatter)
        return formatter.getvalue().rstrip("\n")
Formats the usage line into a string and returns it.

        Calls :meth:`format_usage` internally.
        
dynaconf/vendor/click/core.py