docs: public void setVariableOpt(String variableName, int variableValue) {
          // We want to avoid the integer to string conversion if the template variable does not exist.
          int varNo = mtp.lookupVariableName(variableName);
          if (varNo == -1) {
              return;
          }
          varValuesTab[varNo] = Integer.toString(variableValue);
      }