src/vs/editor/browser/controller/mouseTarget.ts/MouseTargetFactory/_hitTestTextArea
class MouseTargetFactory:	private static _hitTestTextArea(ctx: HitTestContext, request: ResolvedHitTestRequest): IMouseTarget | null {
		// Is it the textarea?
		if (ElementPath.isTextArea(request.targetPath)) {
			if (ctx.lastRenderData.lastTextareaPosition) {
				return request.fulfillContentText(ctx.lastRenderData.lastTextareaPosition, null, { mightBeForeignElement: false, injectedText: null });
			}
			return request.fulfillTextarea();
		}
		return null;
	}