We also looked at whether people tend to tap the label or the icon for these different signifiers, under the assumption that, if indeed there is a strong tendency to tap only on one of them, we could, perhaps, separate the functionality of the two (a la split buttons). As we will see in the following sections, the font-family is just the underlying medium that allows the UI5 framework to render icons. To ensure that the frameworks CSS for the ui.tree.TreeTable control is loaded before our custom CSS, simply include the sap.ui.table library in the data-sap-ui-libs property of the