How to use the y-protocols/sync.js.writeSyncStep1 function in y-protocols

connect () {
    if (!this.tc.onlineConns.has(this)) {
      this.tc.onlineConns.add(this)
      const encoder = encoding.createEncoder()
      syncProtocol.writeSyncStep1(encoder, this)
      // publish SyncStep1
      broadcastMessage(this, encoding.toBuffer(encoder))
      this.tc.onlineConns.forEach(remoteYInstance => {
        if (remoteYInstance !== this) {
          // remote instance sends instance to this instance
          const encoder = encoding.createEncoder()
          syncProtocol.writeSyncStep1(encoder, remoteYInstance)
          this._receive(encoding.toBuffer(encoder), remoteYInstance)
        }
      })
    }
  }
  /**

this.tc.onlineConns.forEach(remoteYInstance => {
        if (remoteYInstance !== this) {
          // remote instance sends instance to this instance
          const encoder = encoding.createEncoder()
          syncProtocol.writeSyncStep1(encoder, remoteYInstance)
          this._receive(encoding.toBuffer(encoder), remoteYInstance)
        }
      })
    }

connect () {
    // signal through all available signaling connections
    announceSignalingInfo(this)
    const roomName = this.name
    bc.subscribe(roomName, this._bcSubscriber)
    this.bcconnected = true
    // broadcast peerId via broadcastchannel
    broadcastBcPeerId(this)
    // write sync step 1
    const encoderSync = encoding.createEncoder()
    encoding.writeVarUint(encoderSync, messageSync)
    syncProtocol.writeSyncStep1(encoderSync, this.doc)
    broadcastBcMessage(this, encoding.toUint8Array(encoderSync))
    // broadcast local state
    const encoderState = encoding.createEncoder()
    encoding.writeVarUint(encoderState, messageSync)
    syncProtocol.writeSyncStep2(encoderState, this.doc)
    broadcastBcMessage(this, encoding.toUint8Array(encoderState))
    // write queryAwareness
    const encoderAwarenessQuery = encoding.createEncoder()
    encoding.writeVarUint(encoderAwarenessQuery, messageQueryAwareness)
    broadcastBcMessage(this, encoding.toUint8Array(encoderAwarenessQuery))
    // broadcast local awareness state
    const encoderAwarenessState = encoding.createEncoder()
    encoding.writeVarUint(encoderAwarenessState, messageAwareness)
    encoding.writeVarUint8Array(encoderAwarenessState, awarenessProtocol.encodeAwarenessUpdate(this.awareness, [this.doc.clientID]))
    broadcastBcMessage(this, encoding.toUint8Array(encoderAwarenessState))
  }

this.peer.on('connect', () => {
      log('connected to ', logging.BOLD, remotePeerId)
      this.connected = true
      // send sync step 1
      const provider = room.provider
      const doc = provider.doc
      const awareness = room.awareness
      const encoder = encoding.createEncoder()
      encoding.writeVarUint(encoder, messageSync)
      syncProtocol.writeSyncStep1(encoder, doc)
      sendWebrtcConn(this, encoder)
      const awarenessStates = awareness.getStates()
      if (awarenessStates.size > 0) {
        const encoder = encoding.createEncoder()
        encoding.writeVarUint(encoder, messageAwareness)
        encoding.writeVarUint8Array(encoder, awarenessProtocol.encodeAwarenessUpdate(awareness, Array.from(awarenessStates.keys())))
        sendWebrtcConn(this, encoder)
      }
    })
    this.peer.on('close', () => {