what does “swap over” mean? “Don’t you want to ask me anything else?” “You know what?” said Strike. “I do. Why would you have a detachable lining in a handbag?” She stared at him for several seconds, then let out a great giggle, slumping sideways into his shoulder, nudging him. Lithe and slight, she continued to rest against him as she said: “You are funny.” “But why would you?” “Well, it just makes the bag more, like, individual; you can customize them, you see; you can buy a couple of linings and swap them over; you can pull them out and use them as scarves; they’re beautiful. Silk with gorgeous patterns. The zip edging is very rock-and-roll.”