lib/hapiCrudHelper.js
function empty (entity, schema, Empty) {
  if (typeof entity === 'undefined' || entity === null) {
    return
  }
  _.forEach(schema, function(v, k) {
    if (v === Empty) {
      delete entity[k]
    }
  })
}
function empty (entity, schema, Empty) {
  if (typeof entity === 'undefined' || entity === null) {
    return
  }
  _.forEach(schema, function(v, k) {
    if (v === Empty) {
      delete entity[k]
    }
  })
}
Deletes any properties from the entity which in the schema are marked as Empty.