syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"assert_eq!(reverse_map_prefix(mapping,"}]}
source_snippet:         assert_eq!(reverse_map_prefix(mapping, "./hello.rs"), None);
context_before:         assert_eq!(reverse_map_prefix(mapping, "/hello.rs"), None);
context_after:     }