Application of registration-framework in TemplateFlow?

Dear all,

I would like to apply the registration-framework in TemplateFlow to register the MNI152NLin2009cSym template to the MNI152NLin2009cAsym template as some atlases only available in the MNI152NLin2009cSym template.

I wonder if there is any documentation or example code for the application of this nice tool?

Thanks a lot!