What are the devices used in Once Upon a Time by Nadine Gordimer?PLEASE GIVE EXAMPLES FROM THE TEXT

The frame narrative is the opening literary device that
Gordimer uses in the story.  In true postmodern fashion, she creates a story of which
she is a part.  Her defiance at the "need" to write a children's story coupled with her
own paranoia at what creaks below is what causes the story to form.  Both of these
elements are thematically germane to what we end up reading in the story.  In terms of
the story itself, the thematic repetition of the family's happiness and how they were
content with one another is an excellent juxtaposition to the unknown nature of the
world, and the collision of both settings end up creating the horrific set of
circumstances for the ending.  Gordimer is really adroit at being able to use thematic
and character development as a way to build the plot.  Finally, the allegorical nature
of the story is compelling in how it reflects the desire for perfection revealing a tale
of destruction underneath.  The symbolism of being so insistent on creating a world
where one appropriates it in accordance to their own subjectivity without integrating
the presence of the dialectical "other" in the process is something that Gordimer is
quite deliberate in creating.