syntax_data: {"ast_node_type":"variable","tokens":[{"end":75,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let mut inputs_and_output = sig.inputs_and_output.to_vec();
context_before:             if let ty::InstanceKind::VTableShim(..) = instance.def {
context_after:                 inputs_and_output[0] = Ty::new_mut_ptr(tcx, inputs_and_output[0]);