syntax_data: {"ast_node_type":"variable","tokens":[{"end":84,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let FieldsShape::Array { stride, count } = &layout.fields else {
context_before:                 ty::Array(inner_ty, _len) => {
context_after:                         return Err(Err::NotYetSupported);