syntax_data: {"ast_node_type":"function","tokens":[{"end":40,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                 if !deprecated_safe_fn {
context_before:                 let deprecated_safe_fn = self.emit_deprecated_safe_fn_call(span, &kind);
context_after:                     // unsafe_op_in_unsafe_fn is disallowed