syntax_data: {"ast_node_type":"variable","tokens":[{"end":40,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let (lo, len_with_tag, parent) =
context_before:     fn from_span(span: Span) -> InlineParent {
context_after:             (span.lo_or_index, span.len_with_tag_or_marker, span.ctxt_or_parent_or_marker);