message: made remult optional for controller base
diff: @@ -1946,15 +1946,15 @@ export class EntityBase {
  }
  export class ControllerBase {
  - constructor(protected remult: Remult) {
  + constructor(protected remult?: Remult) {
  }
  assign(values: Partial<Omit<this, keyof EntityBase>>) {
  assign(this, values);
  return this;
  }
  - get $() { return getFields(this) }
  - get _() { return getControllerRef(this) }
  + get $() { return getFields(this, this.remult) }
  + get _() { return getControllerRef(this, this.remult) }
  }
  