//
@co_call(par_area,par_class,"getSchemaX",par_area=>par_area,par_class=>par_class,par_id=>par_id,callback=>'coa_GetElement(cnx,callbacks,0)', deep_level=>2);
@co_call(par_area,par_class,"get",par_area=>par_area,par_class=>par_class,par_id=>par_id,callback=>'coa_GetElement(cnx,callbacks,1)');