src/vs/workbench/contrib/debug/browser/breakpointWidget.ts/createDecorations
function createDecorations(theme: IColorTheme, placeHolder: string): IDecorationOptions[] {
	const transparentForeground = theme.getColor(editorForeground)?.transparent(0.4);
	return [{
		range: {
			startLineNumber: 0,
			endLineNumber: 0,
			startColumn: 0,
			endColumn: 1
		},
		renderOptions: {
			after: {
				contentText: placeHolder,
				color: transparentForeground ? transparentForeground.toString() : undefined
			}
		}
	}];
}