src/vs/workbench/api/common/extHostClipboard.ts/ExtHostClipboard/constructor
class ExtHostClipboard:	constructor(mainContext: IMainContext) {
		const proxy = mainContext.getProxy(MainContext.MainThreadClipboard);
		this.value = Object.freeze({
			readText() {
				return proxy.$readText();
			},
			writeText(value: string) {
				return proxy.$writeText(value);
			}
		});
	}