code: public void setInlineRequiredOptions(final Datastore datastore, final Class<T> clazz, final Mapper mapper, final EntityCache cache) {
          this.mapper = mapper;
          this.datastore = datastore;
          this.clazz = clazz;
          this.cache = cache;
      }
docs: Sets the required options when the operation type was INLINE
  
  @param datastore the Datastore to use when fetching this reference
  @param clazz     the type of the results
  @param mapper    the mapper to use
  @param cache     the cache of entities seen so far
  @see OutputType