syntax_data: {"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"\"gather"}]}
source_snippet:         "gather metadata statistics (default: no)"),
context_before:     meta_stats: bool = (false, parse_bool, [UNTRACKED],
context_after:     metrics_dir: Option<PathBuf> = (None, parse_opt_pathbuf, [UNTRACKED],