Wrapper S7 class for the tbl_tree class of the tidytree package.
Details
Convenient tbl_tree objects are typically constructed with the
makeTidyTree() function. In addition to usual tbl_tree objects, they
also have a isTip column (boolean) and a y column that indicates the
order in which the nodes would be plotted. This is needed by the
orderWithTree() function that helps making heatmaps sorted in the same way.