{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"impl<FieldIdx:"}]}
impl<FieldIdx: Idx, VariantIdx: Idx> LayoutData<FieldIdx, VariantIdx> {
/// "Simple" layout constructors that cannot fail.
    pub fn unit<C: HasDataLayout>(cx: &C, sized: bool) -> Self {