syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"self.requires_unsafe(expr.span,"}]}
source_snippet:                     self.requires_unsafe(expr.span, InitializingTypeWithUnsafeField)
context_before:                 if adt_def.variant(variant_index).has_unsafe_fields() {
context_after:                 }