syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// words, if the set of names in `self` is a strict subset of
context_before:     /// Returns `true` if `self` cannot name some names from `other` -- in other
context_after:     /// those in `other` (`self < other`).