# OptionalReferrers

constructor(reference: Column<REF?>, factory: EntityClass<ChildID, Child>, cache: Boolean, references: Map<Column<*>, Column<*>>? = null)

#### Parameters

reference

The nullable reference column defined on the child entity's associated table.

factory

The EntityClass associated with the child entity that optionally references the parent entity.

cache

Whether loaded reference entities should be stored in the EntityCache.