src/vs/editor/contrib/suggest/browser/suggestMemory.ts/LRUMemory/fromJSON
class LRUMemory:	fromJSON(data: [string, MemItem][]): void {
		this._cache.clear();
		const seq = 0;
		for (const [key, value] of data) {
			value.touch = seq;
			value.type = typeof value.type === 'number' ? value.type : CompletionItemKinds.fromString(value.type);
			this._cache.set(key, value);
		}
		this._seq = this._cache.size;
	}