syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"Box::new(emitter.ui_testing(sopts.unstable_opts.ui_testing))"}]}
source_snippet:                 Box::new(emitter.ui_testing(sopts.unstable_opts.ui_testing))
context_before:                     );
context_after:             }