syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // Returning a structure. Most often, this will use
context_before:         if fn_abi.ret.layout.is_aggregate() && fn_abi.ret.layout.is_sized() {
context_after:             // a hidden first argument. On some platforms, though,