code: function ensureRefs (vm) {
    if (!vm.$wilddogRefs) {
      vm.$wilddogRefs = Object.create(null)
      vm._wilddogSources = Object.create(null)
      vm._wilddogListeners = Object.create(null)
    }
  }
docs: Ensure the related bookkeeping variables on an instance.
  
  @param {Vue} vm