src/vs/workbench/contrib/snippets/browser/snippetsService.ts/SnippetEnablement/updateIgnored
class SnippetEnablement:	updateIgnored(id: string, value: boolean): void {
		let changed = false;
		if (this._ignored.has(id) && !value) {
			this._ignored.delete(id);
			changed = true;
		} else if (!this._ignored.has(id) && value) {
			this._ignored.add(id);
			changed = true;
		}
		if (changed) {
			this._storageService.store(SnippetEnablement._key, JSON.stringify(Array.from(this._ignored)), StorageScope.PROFILE, StorageTarget.USER);
		}
	}