syntax_data: {"ast_node_type":"function","tokens":[{"end":93,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn set_discr(&self, state_disc: VariantIdx, source_info: SourceInfo) -> Statement<'tcx> {
context_before:     // Create a statement which changes the discriminant
context_after:         let self_place = Place::from(SELF_ARG);