Bug 67890 [PropertiesView] Exception when entries added to properties view
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertySheetViewer.java
}
        };
    }
    /**
     * Creates a new property sheet entry listener.
     */
    private void createEntryListener() {
        entryListener = new IPropertySheetEntryListener() {
            public void childEntriesChanged(IPropertySheetEntry entry) {
                
                if (entry == rootEntry)
                    updateChildrenOf(entry, tree);
                else {
                    TreeItem item = findItem(entry);
                    if (item != null)
                        updateChildrenOf(entry, item);
                }
            }
            public void valueChanged(IPropertySheetEntry entry) {
                
                TreeItem item = findItem(entry);
                if (item != null)
                    updateEntry(entry, item);
            }
            public void errorMessageChanged(IPropertySheetEntry entry) {
                
                setErrorMessage(entry.getErrorText());
            }
        };
    }