var s7BasicZoomViewer = new s7viewers.BasicZoomViewer({
  containerId: 's7viewer-' + iterator,
  params: {
    asset: assetUrl,
    serverurl: serverUrl
  },
  handlers: {
    initComplete: function () {
      var zoomView = s7BasicZoomViewer.getComponent('zoomView')

      // ive tried passing an object
      s7BasicZoomViewer.zoomView.component.zoomstep = { step: 3, limit: 5 }  // doesnt work

      // ive tried directly setting it on the "zoomView" just like the docs suggest
      zoomView.zoomstep = 2,5  // doesnt work

      // ive also tried passing it as an object
      zoomView.zoomstep = { step: 3, limit: 5 }  // doesnt work
    }
  }
})