How to change ExpandablePanel header on expand collapse?

[mackmilan]

Is there a way to change the ExpandablePanel header on expand, collapse. tnx.

[fbognini]

If your header must change you don't need to use a header :) Add to the collapsed property your current header and to the expanded property the changed one.

Like this:

ExpandablePanel(
  collapsed: Column(
	children: <Widget>[
	  currentHeader(context),
	  currentCollapsed(context)
	],
  ),
  expanded: Column(
	children: <Widget>[
	  changedHeader(context),
	  currentExpanded(context)
	],
  ),
)