syntax_data: {"ast_node_type":"variable","tokens":[{"end":93,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let Some(assume) = rustc_transmute::Assume::from_const(self.infcx.tcx, assume) else {
context_before:         }
context_after:             return Err(SelectionError::Unimplemented);