headerHeight property
Defines the front layer's height when minimized (back layer revealed).
Defaults to measured height of subHeader if provided, else 32.
To automatically use the difference of the screen height and back layer's
height, see stickyFrontLayer. Note headerHeight is ignored if it is
less than the available size and stickyFrontLayer is true
.
To vary the front layer's height when active (back layer concealed), see frontLayerActiveFactor.
Implementation
final double? headerHeight;