syntax_data: {"ast_node_type":"function","tokens":[{"end":68,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:             fn print(&$self, $p: &mut P) -> Result<(), PrintError> {
context_before:         $(impl<'tcx, P: PrettyPrinter<'tcx>> Print<'tcx, P> for $ty {
context_after:                 let _: () = $print;