anchor.diff:          call warn_unused_args(lua_state, keys, opts)
           call aot_table_close(lua_state, opts)
   
  -        call flu_pushlightuserdata(lua_state, c_loc(sys))
  +        call push_sys(lua_state, sys)
           nreturn = 1
   
       end function lua_hubbard_k
  
positive.code:         !        twist = {...},    -- D-dimensional vector.
          !    }
  
          use, intrinsic :: iso_c_binding, only: c_ptr, c_int, c_loc
          use flu_binding, only: flu_State, flu_copyptr, flu_gettop, flu_pushlightuserdata
          use aot_top_module, only: aot_top_get_val
          use aot_table_module, only: aot_table_top, aot_get_val, aot_exists, aot_table_close
  
  
negative.code:         call warn_unused_args(lua_state, keys, opts)
          call aot_table_close(lua_state, opts)
  
          call push_sys(lua_state, sys)
          nreturn = 1
  
      end function lua_ringium
  