class duplication (or general duplication):
%<name>

handlesetvar concept:
local variables (with attributes):
    do special handlegetattribute to get a pointer on datastack
    call set function on pointer with new value.
    - order -
    value loaded on datastack first, then set function.

get pointer manually:
&<name>

make a new variable:
§<name>
or
§&%<name>   creates a new variable and returns an pointer pointing to an copy of the new variable