syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"span.ctxt.hash_stable(ctx,"}]}
source_snippet:         span.ctxt.hash_stable(ctx, hasher);
context_before:         let span = self.data_untracked();
context_after:         span.parent.hash_stable(ctx, hasher);