syntax_data: {"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // If it returns `Err` the span is fully interned and the context is > MAX_CTXT.
context_before:             // If `inline_ctxt` returns `Ok` the context is <= MAX_CTXT.
context_after:             // As these do not overlap an `Ok` and `Err` result cannot have an equal context.