syntax_data: {"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"local_path:"}]}
source_snippet:         local_path: Some(working_directory.clone()),
context_before:     let working_directory = RealFileName::Remapped {
context_after:         virtual_name: mapping.map_prefix(working_directory).0.into_owned(),