syntax_data: {"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // Format and emit explanatory notes about default binding modes. Reversing the spans' order
context_before:     fn add_to_diag<G: EmissionGuarantee>(self, diag: &mut Diag<'_, G>) {
context_after:         // means if we have nested spans, the innermost ones will be visited first.