syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"Variants::Multiple"}]}
source_snippet:                     Variants::Multiple { .. } => return Err(CannotUseFpConv),
context_before:                 match arg_layout.variants {
context_after:                     Variants::Single { .. } | Variants::Empty => (),