{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":".wrapping_sub(niche_variants.start().as_u32()"}]}
                    .wrapping_sub(niche_variants.start().as_u32() as u128)
                let value = (variant_index.as_u32() as u128)
                    .wrapping_add(niche_start);