Bug 42143 Dialogs for source actions do not use dialog font [dialogs]
select a cu in package explorer context menu "Source": "Override/Implement methods..." "Generate Getters and Setters..." "Generate Delegate methods..." "Add constructor from superclass..." "Generate constructor using fields..."
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/GenerateNewConstructorUsingFieldsAction.java
private static int fEntries;
		private IType fType;
		private GenerateConstructorUsingFieldsSelectionDialog fDialog;
		List fExistingSigs;
		GenerateConstructorUsingFieldsValidator(int entries) {
			super();
			fEntries= entries;
			fType= null;
		}
		GenerateConstructorUsingFieldsValidator(int entries, GenerateConstructorUsingFieldsSelectionDialog dialog, IType type) {
			super();
			fEntries= entries;
			fDialog= dialog;
			fType= type;
				
			fExistingSigs= getExistingConstructorSignatures();
		}
		public IStatus validate(Object[] selection) {
			StringBuffer buffer= new StringBuffer();
			buffer.append("("); 
			
			IMethod chosenSuper= fDialog.getSuperConstructorChoice();
			try {