syntax_data: {"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"self.requires_unsafe(pat.pattern.span,"}]}
source_snippet:                         self.requires_unsafe(pat.pattern.span, UseOfUnsafeField);
context_before:                     if adt_def.variant(*variant_index).fields[*field].safety.is_unsafe() {
context_after:                     }