title: Android constraint layout include another layout
body: <p>I am having more of a conceptual question when it comes to <code>ConstraintLayout</code>. I want to re-use a layout inside my <code>ConstraintLayout</code>. But I ask myself a question that the <code>ConstraintLayout</code> aims at avoiding nesting of layouts and including a layout will decrease the <code>ConstraintLayout</code> performance. What is the best/ good practice to avoid nesting of layouts and at the same time re-use a layout so as to avoid code duplication?</p>