syntax_data: {"ast_node_type":"function","tokens":[{"end":56,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn with_neighbor(self, neighbor: Span) -> Span {
context_before:     /// This span, but in a larger context, may switch to the metavariable span if suitable.
context_after:         match Span::prepare_to_combine(self, neighbor) {