src/vs/editor/contrib/suggest/suggestMemory.ts/PrefixMemory/fromJSON
class PrefixMemory:	fromJSON(data: [string, MemItem][]): void {
		this._trie.clear();
		if (data.length > 0) {
			this._seq = data[0][1].touch + 1;
			for (const [key, value] of data) {
				value.type = typeof value.type === 'number' ? value.type : completionKindFromString(value.type);
				this._trie.set(key, value);
			}
		}
	}