{"ast_node_type":"variable","tokens":[{"end":81,"kind":"keyword","start":0,"text":"let"}]}
        let src_kind = pointer_kind(src, table).map_err(|_| CastError::Unknown)?;
    ) -> Result<(), CastError> {
        let dst_kind = pointer_kind(dst, table).map_err(|_| CastError::Unknown)?;