syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // Partially-interned format.
context_before:         } else if $span.ctxt_or_parent_or_marker != CTXT_INTERNED_MARKER {
context_after:             let $span3 = PartiallyInterned::from_span($span);