Method update

dropbox/files.py:10797–10805

Create an instance of this class set to the ``update`` tag with value ``val``. :param str val: :rtype: WriteMode

(cls, val)

    @classmethod
    def update(cls, val):
        """
        Create an instance of this class set to the ``update`` tag with value
        ``val``.

        :param str val:
        :rtype: WriteMode
        """
        return cls('update', val)

    def is_add(self):
        """