Provide utility for layering tfrmt objects together. If both tfrmt's have values, it will preferentially choose the second tfrmt by default. This is an alternative to piping together tfrmt's
Details
join_body_plan
When combining two body_plans, the body plans will stack together, first the body plan from x tfrmt then y tfrmt. This means that frmt_structures in y will take priority over those in x.
Combining two tfrmt with large body_plans can lead to slow table evaluation.
Consider setting join_body_plan
to FALSE
. Only the y body_plan
will be
preserved.