syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"\"an"}]}
source_snippet:         "an optional path to the profiling data output directory";
context_before:     pub(crate) const parse_switch_with_opt_path: &str =
context_after:     pub(crate) const parse_merge_functions: &str =