Bug 40788 [plan item] Configurable Next/Previous actions
Toolbar drop down, or editor specific control. Needs to be coordinated with Platform UI.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
if (reference instanceof IMember) {
					range= ((IMember) reference).getNameRange();
					if (range != null) {
						offset= range.getOffset();
						length= range.getLength();
					}
				} else if (reference instanceof IImportDeclaration) {
					String name= ((IImportDeclaration) reference).getElementName();
					if (name != null && name.length() > 0) {
						String content= reference.getSource();
						if (content != null) {
							offset= range.getOffset() + content.indexOf(name);
							length= name.length();
						}
					}
				} else if (reference instanceof IPackageDeclaration) {
					String name= ((IPackageDeclaration) reference).getElementName();
					if (name != null && name.length() > 0) {
						String content= reference.getSource();
						if (content != null) {
							offset= range.getOffset() + content.indexOf(name);
							length= name.length();
						}
					}
				}
				
				if (offset > -1 && length > 0) {
					
					try  {
						textWidget.setRedraw(false);