How to set size for native ads?

[narakai]

Admobadapter version or commit:
1.4.6
Android compileSdkVersion:
26
Issue description briefly:
Could not find any methods to set height for native ads, I am using AdmobRecyclerAdapterWrapper.
Steps to reproduce:
Use AdmobRecyclerAdapterWrapper to show native ads.
All the code which you want to share
adapterWrapper = new AdmobRecyclerAdapterWrapper(mActivity, "XXX");
adapterWrapper.setFirstAdIndex(3);
adapterWrapper.setAdapter(mRecyclerAdapter);