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); }