SwingUtilities.invokeLater and composite xml

Hi all, have 2 questions :

First, Are there anything like SwingUtilities.invokeLater in midp or kuix ?

Second. Suppose i have an xml which form a screen ui, say it xml_A. Then i want to build another screen, say it xml_B. But xml_B is a composite of, say it a textField and ui specified in xml_A. Can i linked xml_A from xml_B ?

Maybe something like this :

xml_B :

<screen>

<container>

<text>just a test</text>

<custom link="xml_B.xml" linkProvider="aDataProvider"></custom>

</container>

</screen>

Note : i write xml_B just to help my second point clear. It's not a kuix xml format.