How does the author use metaphor in the novel, A Train to Moscow?

One example of metaphor can be found when Andrei, Sasha's childhood friend, breaks the news that the government is shutting down a play. He says the decision was made because “The public wants optimism” (231). Sasha argues that the public is rushing to buy tickets to the play and they have a right to see a play that mimics real life instead of the glorious future touted by government officials. Andrei counters, saying that her opinion is an indication the government officials “have a lot of work to do” (231). Sasha feels her character in the play, including a scene where she is raped, is a metaphor for life in Russia. She feels it is also a metaphor for her relationship with Andrei. In the case of the latter, Andrei has chosen his duty to the Party over his love for Sasha.