message: added lookupAsync to column
diff: @@ -858,6 +858,11 @@ export class Column<dataType> {
  filter = <any>this;
  return this._entity.lookup(lookupEntity, filter);
  }
  + async lookupAsync<lookupIdType, entityType extends Entity<lookupIdType>>(lookupEntity: entityType, filter?: Column<lookupIdType> | ((entityType: entityType) => FilterBase)): entityType {
  + if (!filter)
  + filter = <any>this;
  + return await this._entity.lookupAsync(lookupEntity, filter);
  + }
  __isVirtual() {
  if (this.__settings && this.__settings.virtualData)
  return true;
  