How to use the @microsoft/recognizers-text-sequence.recognizeMention function in @microsoft/recognizers-text-sequence

protected async onRecognize(context: TurnContext, state: any, options: PromptOptions): Promise> {
        const result: PromptRecognizerResult = { succeeded: false };
        let results: any;
        const activity: Activity = context.activity;
        const utterance: string = activity.text;
        const locale: string = activity.locale || this.defaultLocale || 'en-us';
        switch(this.promptType)
        {
            case SocialMediaPromptType.Mention:
                results = recognizers.recognizeMention(utterance, locale);
                break;
            case SocialMediaPromptType.Hashtag:
                results = recognizers.recognizeHashtag(utterance, locale);
                break;
        }
        if (results.length > 0 && results[0].resolution != null) {
            try {
                result.succeeded = true;
                result.value = results[0].resolution.value;
            }
            catch(e) {
                console.log(e);
            }
        }
        return result;
    }

public async onTurn(context: TurnContext, next: () => Promise): Promise {
        if (context.activity.type === ActivityTypes.Message) {
            const mentions: ModelResult[] = recognizeMention(context.activity.text, this.defaultLocale);
            const hastags: ModelResult[] = recognizeHashtag(context.activity.text, this.defaultLocale);
            const mentionEntities: string[] = [];
            const hastagEntities: string[] = [];
            if (mentions.length > 0) {
                for (const i of mentions) {
                    mentionEntities.push(i.resolution.value);
                }
                context.turnState.set('mentionEntities', mentionEntities);
            }
            if (hastags.length > 0) {
                for (const i of hastags) {
                    hastagEntities.push(i.resolution.value);
                }
                context.turnState.set('hastagEntities', hastagEntities);
            }
        }