syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if arg.is_ignore() && arg.layout.is_zst() {
context_before:     for arg in fn_abi.args.iter_mut() {
context_after:             // Windows ABIs do not talk about ZST since such types do not exist in MSVC.