void distributeContent()

Force this element to distribute its children to its local dom. A user should call distributeContent if distribution has been invalidated due to changes to selectors on child elements that effect distribution that were not made via Polymer.dom. For example, if an element contains an insertion point with <content select=".foo"> and a foo class is added to a child, then distributeContent must be called to update local dom distribution.

Source

void distributeContent() {
  jsElement.callMethod('distributeContent');
}