syntax_data: {"ast_node_type":"function","tokens":[{"end":78,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn normalize_to_macro_rules(&self, ctxt: SyntaxContext) -> SyntaxContext {
context_before:     #[inline]
context_after:         self.syntax_context_data[ctxt.0 as usize].opaque_and_semiopaque