public void removeOpacitymap()
        {
            GuiTextListCtrl opacityList =
                ((GuiControl)"TerrainImportGui").findObjectByInternalName("OpacityLayerTextList", true);
            int itemIdx = opacityList.getSelectedId();

            if (itemIdx < 0)
            {
                return;
            }

            ArrayObject namesArray    = this["namesArray"];
            ArrayObject channelsArray = this["channelsArray"];

            namesArray.erase(itemIdx);
            channelsArray.erase(itemIdx);

            opacityList.removeRowById(itemIdx);
        }