syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"(span.lo_or_index,"}]}
source_snippet:             (span.lo_or_index, span.len_with_tag_or_marker, span.ctxt_or_parent_or_marker);
context_before:         let (lo, len, ctxt) =
context_after:         InlineCtxt { lo, len, ctxt }