How does the author use metaphor in the novel, Homegoing?

The author uses dreams as a metaphoric representation of the book's thematic interest in scars - more specifically, unconscious psychological scars that make their presence felt by emerging into dreams. In each case of dreams in the novel (particularly that of Akua - Part 2, Chapter 2), the dream or premonitions has connections to important elements of family history, elements that relate to traumatizing incidents or experiences in the past.