syntax_data: {"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: ///   `parent` is large, or if both values are non-zero. The number of bits
context_before: ///   `SpanData`, which means intering will happen if `ctxt` is large, if
context_after: ///   needed for `ctxt` values depend partly on the crate size and partly on