syntax_data: {"ast_node_type":"variable","tokens":[{"end":83,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let unsafe_op_in_unsafe_fn_allowed = self.unsafe_op_in_unsafe_fn_allowed();
context_before:     fn requires_unsafe(&mut self, span: Span, kind: UnsafeOpKind) {
context_after:         match self.safety_context {