src/vs/workbench/contrib/feedback/browser/feedbackStatusbarItem.ts/TwitterFeedbackService/getCharacterLimit
class TwitterFeedbackService:	getCharacterLimit(sentiment: number): number {
		let length: number = 0;
		if (sentiment === 1) {
			TwitterFeedbackService.HASHTAGS.forEach(element => {
				length += element.length + 2;
			});
		}

		if (TwitterFeedbackService.VIA_NAME) {
			length += ` via @${TwitterFeedbackService.VIA_NAME}`.length;
		}

		return 280 - length;
	}