{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"ecx.sess.opts.unstable_opts.proc_macro_execution_strategy"}]}
        ecx.sess.opts.unstable_opts.proc_macro_execution_strategy
    pm::bridge::server::MaybeCrossThread::<MessagePipe<_>>::new(
            == ProcMacroExecutionStrategy::CrossThread,