Accordion Layout initial state

Is there a way to create an Accordion where all of the panesl are initially closed? I could not find any examples and rather than waiting for the form to load and then try to call a method to close the first panel I would like to have the initial rendering of the accordion be collapsed.

never mind, dumb question, i was trying to find a property in the accordion object when all i need to do was set each child's collapsed property to true