sendUserMessageContent(content = []) {
    if (content.length) {
      for (const c of content) {
        if (c.type === 'input_audio') {
          if (c.audio instanceof ArrayBuffer || c.audio instanceof Int16Array) {
            c.audio = RealtimeUtils.arrayBufferToBase64(c.audio);
          }
        }
      }
      this.realtime.send('conversation.item.create', {
        item: {
          type: 'message',
          role: 'user',
          content,
        },
      });
    }
    this.createResponse();
    return true;
  }
Sends user message content and generates a response
@param {Array<InputTextContentType|InputAudioContentType>} content
@returns {true}