syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"sess.dcx().emit_err(errors::UnstableVirtualFunctionElimination);"}]}
source_snippet:             sess.dcx().emit_err(errors::UnstableVirtualFunctionElimination);
context_before:         if sess.opts.unstable_opts.virtual_function_elimination {
context_after:         }