syntax_data: {"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"s.push_str(\"\\n\\nSyntaxContexts:\");"}]}
source_snippet:             s.push_str("\n\nSyntaxContexts:");
context_before:             foreign_expn_data.into_iter().for_each(debug_expn_data);
context_after:             data.syntax_context_data.iter().enumerate().for_each(|(id, ctxt)| {