Bug 67890 [PropertiesView] Exception when entries added to properties view
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertySheetEntry.java
}
        if (change)
            refreshFromRoot();
    }
    /**
     * Set the descriptor.
     * @param newDescriptor
     */
    private void setDescriptor(IPropertyDescriptor newDescriptor) {
        
        
        if (descriptor != newDescriptor && editor != null) {
            editor.dispose();
            editor = null;
        }
        descriptor = newDescriptor;
    }
    /*
     * Set the error text.  This should be set to null when
     * the current value is valid, otherwise it should be
     * set to a error string
     */
    private void setErrorText(String newErrorText) {
        errorText = newErrorText;
        
        fireErrorMessageChanged();
    }
    /**
     * Sets the parent of the entry to be propertySheetEntry.
     * @param propertySheetEntry