ContentApp#selectRowByPath(String absolutePath) may trick some devs into thinking that absolutePath is a JCR path whereas this is not necessarily the case. Path here actually represents labels next to Grid expander elements that need to be expanded in order to get to the element to select.
The method is effectively the same as the old framework's AbstractMagnoliaUITest#expandTreeAndSelectAnElement(java.lang.String).
Perhaps renaming the new method along those lines and a better javadoc is all we need.