rightSplitter = Elements.createDivElement(css.rightSplitter());
rightSidebarContentContainer = Elements.createDivElement(css.rightSidebarContentContainer());
Element elem = getElement();
navArea.appendChild(navView.getElement());
elem.appendChild(navArea);
elem.appendChild(splitter);
elem.appendChild(contentView.getElement());
// Attach the right sidebar and splitter to the base element of the
// WorkspaceContentArea.View.