syntax_data: {"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// and you only care that they point to the same bytes of source text.
context_before:     /// Use this instead of `==` when either span could be generated code,
context_after:     pub fn source_equal(self, other: Span) -> bool {