syntax_data: {"ast_node_type":"struct","tokens":[{"end":46,"kind":"keyword","start":0,"text":"struct"}]}
source_snippet: struct ExternAbiWrapper(rustc_abi::ExternAbi);
context_before: /// `ExternAbi` is in `rustc_abi`, which doesn't have access to the macro and serde.
context_after: impl FromStr for ExternAbiWrapper {