syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"CanonAbi::X86(X86Call::Stdcall)"}]}
source_snippet:                 CanonAbi::X86(X86Call::Stdcall)
context_before:             (ExternAbi::System { .. }, Arch::X86) if os == OsKind::Windows && !has_c_varargs => {
context_after:             }