syntax_data: {"ast_node_type":"function","tokens":[{"end":81,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn consts(&mut self, a: I::Const, b: I::Const) -> RelateResult<I, I::Const> {
context_before:     #[instrument(skip(self), level = "trace")]
context_after:         super_combine_consts(self.infcx, self, a, b)