syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"assert_eq!(map_path_prefix(mapping,"}]}
source_snippet:         assert_eq!(map_path_prefix(mapping, "/abc/def/src/main.rs"), path_str("foo/src/main.rs"));
context_after:         assert_eq!(map_path_prefix(mapping, "/abc/def"), path_str("foo"));