180                     index += this.offset;

   180                     index += this.offset;

   181                 }

   181                 }

   182             }

   182             }

   183             return index;

   183             return index;

   184         }

   184         }

   185         change_hmi_value(index, opstr) {

   186         change_hmi_value(index, opstr) {

   186             let realindex = this.get_variable_index(index);

   187             let realindex = this.get_variable_index(index);

   187             if(realindex == undefined) return undefined;

   188             if(realindex == undefined) return undefined;

   189         }

   192         }

   190 

   193 

   191         apply_hmi_value(index, new_val) {

   194         apply_hmi_value(index, new_val) {

   192             let realindex = this.get_variable_index(index);

   195             let realindex = this.get_variable_index(index);

   193             if(realindex == undefined) return undefined;

   196             if(realindex == undefined) return undefined;