syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"simulate_remapped_rust_src_base:"}]}
source_snippet:     simulate_remapped_rust_src_base: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
context_before:         "allow argument files to be specified with POSIX \"shell-style\" argument quoting"),
context_after:         "simulate the effect of remap-debuginfo = true at bootstrapping by remapping path \