syntax_data: {"ast_node_type":"variable","tokens":[{"end":40,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let shim_kind = match instance.def {
context_before:     // Append `::{shim:...#0}` to shims that can coexist with a non-shim instance.
context_after:         ty::InstanceKind::ThreadLocalShim(_) => Some("tls"),