syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// - the other variants as a backwards-compatible `crt-objects-fallback` string
context_before:     /// - individual components in a `link-self-contained` object value
context_after:     fn json_key(self) -> &'static str {