{"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"bx.cx().const_uint(cast_to,"}]}
                        bx.cx().const_uint(cast_to, niche_variants.start().as_u32() as u64);
                    let tagged_discr =
                    (is_niche, tagged_discr, 0)