syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:                     for pat in subpatterns {
context_before:                 if let ty::Adt(adt_def, ..) = pat.ty.kind() {
context_after:                         if adt_def.non_enum_variant().fields[pat.field].safety.is_unsafe() {