/**
  * Create or update (if exists) an object
  * Removes all client side helper attributes (starting with _)
  * bevore transmitting the object to the server.
  * @param el 
  */
 public async save(el: ElexisType) {
   for (const attr in el) {
     if (el.hasOwnProperty(attr)) {
       if (attr.startsWith("_")) {
         delete el[attr];
       }
     }
   }
   if (el.id) {
     return await this.dataService.update(el.id, el);
   } else {
     return await this.dataService.create(el);
   }
 }

 /**
  * Fetch Object with given id
  * @param id 
  * @returns the object or undefined if no such object was found
  */
 public async fetch(id: UUID) {
   try {
     return await this.dataService.get(id);
   } catch (err) {
     return undefined
   }
 }

 public attached() {
   this.briefeService
     .find({ query: { typ: "Vorlagen", Betreff: { $like: "%_webelexis" } } })
     .then((result: IQueryResult) => {
       this.templates = result.data;
     });
 }

 public async findBlock(name: string, userid?: UUID) {
   const q = { name }
   if (userid) {
     q["mandantid"] = userid
   }
   const found = await this.lbService.find({ query: q })
   if (found && found.data && found.data.length > 0) {
     return found.data[0]
   } else {
     return undefined
   }
 }

 /**
  * Delete Object
  * @param el 
  * @returns the deleted object
  */
 public async remove(el: ElexisType) {
   return await this.dataService.remove(el.id)
 }

 /**
  * Apply a billing-block to an encounter
  * @param id id of block to apply
  * @param kons Encounter to apply billing
  * @param others other billings already applied to the encounter (to  check conformance etc.)
  */
 public async applyBlock(id: UUID, kons: EncounterType, others: BillingModel[]) {
   const lb: LeistungsblockType = await this.lbService.get(id)
   const result = this.createBillings(lb, kons, others)
   return result
 }

 public async getBlock(id: UUID) {
   return this.lbService.get(id)
 }