Returns whether there are any UnityObjectRefs fields in this component.
For struct IComponentData a value of true means that there are UnityObjectRefs fields in this component.
For class based IComponentData, a value of true means that there might be UnityObjectRefs fields in this component. This is because polymorphic UnityObjectRef<T0> members can't be proven statically.
A value of false means there are no UnityObjectRefs fields in this component.