How to use the slate-react/lib/utils/set-transfer-data function in slate-react

handleDragStart = event => {
    const {editor} = this.props
    this._editorNode = ReactDOM.findDOMNode(editor)

    this.setState({isDragging: true})
    this.addDragHandlers()

    const element = ReactDOM.findDOMNode(this.previewContainer)
    const encoded = Base64.serializeNode(this.props.node, {preserveKeys: true})
    setTransferData(event.dataTransfer, TRANSFER_TYPES.NODE, encoded)
    event.dataTransfer.effectAllowed = 'move'
    event.dataTransfer.setDragImage(element, element.clientWidth / 2, -10)
  }

handleDragStart = event => {
    const {editor} = this.props
    this._editorNode = ReactDOM.findDOMNode(editor)

    this.setState({isDragging: true})
    this.addDragHandlers()

    const element = ReactDOM.findDOMNode(this.previewContainer)
    const encoded = Base64.serializeNode(this.props.node, {preserveKeys: true})
    setTransferData(event.dataTransfer, TRANSFER_TYPES.NODE, encoded)
    event.dataTransfer.effectAllowed = 'move'
    event.dataTransfer.setDragImage(element, element.clientWidth / 2, -10)
  }