{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"mir::PlaceElem::Field(fidx,"}]}
                    mir::PlaceElem::Field(fidx, ..) => layout.field(self.fx.cx, fidx.as_usize()),
                layout = match *elem {
                    mir::PlaceElem::Downcast(_, vidx)