src/vs/editor/common/tokenizationRegistry.ts/TokenizationSupportFactoryData/_create
class TokenizationSupportFactoryData:	private async _create(): Promise<void> {
		const value = await Promise.resolve(this._factory.createTokenizationSupport());
		this._isResolved = true;
		if (value && !this._isDisposed) {
			this._register(this._registry.register(this._languageId, value));
		}
	}