CollapsibleTheme class

Theme configuration for Collapsible, CollapsibleTrigger, and CollapsibleContent widgets.

CollapsibleTheme provides styling options for collapsible components including padding, iconography, and layout alignment. It enables consistent collapsible styling across an application while allowing per-instance customization.

Used with ComponentTheme to apply theme values throughout the widget tree.

Example:

ComponentTheme<CollapsibleTheme>(
  data: CollapsibleTheme(
    padding: 12.0,
    iconExpanded: Icons.keyboard_arrow_up,
    iconCollapsed: Icons.keyboard_arrow_down,
    iconGap: 8.0,
    crossAxisAlignment: CrossAxisAlignment.start,
  ),
  child: MyCollapsibleWidget(),
);