src/vs/workbench/services/extensionManagement/browser/extensionBisect.ts/BisectState/fromJSON
class BisectState:	static fromJSON(raw: string | undefined): BisectState | undefined {
		if (!raw) {
			return undefined;
		}
		try {
			interface Raw extends BisectState { }
			const data: Raw = JSON.parse(raw);
			return new BisectState(data.extensions, data.low, data.high, data.mid);
		} catch {
			return undefined;
		}
	}