syntax_data: {"ast_node_type":"function","tokens":[{"end":77,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet: fn reverse_map_prefix(mapping: &FilePathMapping, p: &str) -> Option<String> {
context_after:     mapping.reverse_map_prefix_heuristically(&path(p)).map(|q| q.to_string_lossy().to_string())