BottomSheetTheme
    Customizes the appearance of BottomSheet across the app.
barrier_color: ColorValue | None = None
Overrides the default value of
BottomSheet.barrier_color in all
descendant BottomSheet controls.
bgcolor: ColorValue | None = None
Overrides the default value of BottomSheet.bgcolor in
all descendant BottomSheet controls.
clip_behavior: ClipBehavior | None = None
Overrides the default value of
BottomSheet.clip_behavior in all
descendant BottomSheet controls.
drag_handle_color: ColorValue | None = None
Overrides the default value of drag handle color in all descendant 
BottomSheet controls.
elevation: Number | None = None
Overrides the default value of
BottomSheet.elevation in all descendant
BottomSheet controls.
shadow_color: ColorValue | None = None
Overrides the default value of shadow color in all descendant 
BottomSheet controls.
shape: OutlinedBorder | None = None
Overrides the default value of BottomSheet.shape in all
descendant BottomSheet controls.
show_drag_handle: bool | None = None
Overrides the default value of
BottomSheet.show_drag_handle in all
descendant BottomSheet controls.
size_constraints: BoxConstraints | None = None
Overrides the default value of
BottomSheet.size_constraints in all
descendant BottomSheet controls.
surface_tint_color: ColorValue | None = None
Overrides the default value of surface tint color in all descendant 
BottomSheet controls.