/**
* Returns an existing XDI defer push policy root in this XDI link contract (template), or creates
* a new one.
*
* @param create Whether to create an XDI defer push policy root if it does not exist.
* @return The existing or newly created XDI defer push policy root.
*/
public PolicyRoot getDeferPushPolicyRoot(boolean create) {
XdiEntitySingleton xdiEntitySingleton =
this.getXdiEntity().getXdiEntitySingleton(XDIPolicyConstants.XDI_ADD_DEFER_PUSH, create);
if (xdiEntitySingleton == null) return null;
xdiEntitySingleton =
xdiEntitySingleton.getXdiEntitySingleton(XDIPolicyConstants.XDI_ARC_IF, create);
if (xdiEntitySingleton == null) return null;
return PolicyRoot.fromXdiEntity(xdiEntitySingleton);
}