message: Added expanded parameter to renderHeader callback method.
diff: @@ -100,7 +100,7 @@ class AccordionItem extends React.Component {
  >
  <View>
  {this.props.renderHeader ? (
  - this.props.renderHeader(this.props.item.title)
  + this.props.renderHeader(this.props.item.title, this.props.expanded)
  ) : (
  <DefaultHeader
  title={this.props.item.title}
  