How can I combine two widgets into one?

[ErfanGoharian]

Similar to the figure below, I have two widgets, one is a grouped layer list (combined of multiple layer list) and one classical layer list (which shows all the layers in one layer list). I was wondering how can create something like this figure, where there two tabs that can switch between these two widgets? As Grouped layer list itself is a combination of multiple layer list widget, the whole cannot be combined again with another separate layer list widget:(