src/vs/workbench/browser/codeeditor.ts/RangeHighlightDecorations/doHighlightRange
class RangeHighlightDecorations:	private doHighlightRange(editor: ICodeEditor, selectionRange: IRangeHighlightDecoration) {
		this.removeHighlightRange();

		editor.changeDecorations((changeAccessor: IModelDecorationsChangeAccessor) => {
			this.rangeHighlightDecorationId = changeAccessor.addDecoration(selectionRange.range, this.createRangeHighlightDecoration(selectionRange.isWholeLine));
		});

		this.setEditor(editor);
	}