{"ast_node_type":"other","tokens":[{"end":104,"kind":"keyword","start":0,"text":"//"}]}
                    // (in other words, the knowledge that they're in an extern block must not be used).
                    // Note: All items in an `extern` block need to be lowered as if they're outside of one
                    // This is because an extern block can contain macros whose ItemTree's top-level items