@staticmethod
def get_new(klass, attrs):
    """
        Return a new instance of klass.

        :param klass: The class to create a new instance of.
        :type klass: :class:
        :param attrs: The attributes to set for this new instance.
        :type attrs: dict
        :returns: new instance of klass
        """
    n = klass(**attrs)
    n._new = False
    n._changed = []
    return n
