alwaysShowTitle property
Controls whether middle
widget should always be visible (even in
expanded state).
If true (default) and middle
is not null, middle
widget is always
visible. If false, middle
widget is visible only in collapsed state if
it is provided.
This should be set to false if you only want to show largeTitle in
expanded state and middle
in collapsed state.
Implementation
final bool alwaysShowTitle;