Exception thrown with showDivider property

[Fernando de Oliveira Santos]

With the following code

showMaterialScrollPicker(
      context: context,
      maxLongSide: 350,
      title: 'Pick a language'.tr(),
      selectedItem: getSupportedLanguage(
        nameOrLocale: Right(context.locale),
      ).name,
      items: kSupportedLanguages.map((e) => e.name).toList(),
      onChanged: (value) {
        context.locale = getSupportedLanguage(
          nameOrLocale: Left(value),
        ).locale;
      },
      // showDivider: false,
    )

I'm receiving the following exception:

═══════════════════════════════════════════════════════
The following assertion was thrown building LayoutBuilder:
Failed assertion: boolean expression must not be null

The relevant error-causing widget was:
MaterialApp file:..../lib/presentation/core/app_widget.dart:61:14
When the exception was thrown, this was the stack:
#0 _ScrollPickerState.build. (package:flutter_material_pickers/pickers/scroll_picker.dart:92:34)
#1 _LayoutBuilderElement._layout. (package:flutter/src/widgets/layout_builder.dart:121:33)
#2 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2620:19)
#3 _LayoutBuilderElement._layout (package:flutter/src/widgets/layout_builder.dart:117:11)
#4 RenderObject.invokeLayoutCallback. (package:flutter/src/rendering/object.dart:1868:58)
...
═══════════════════════════════════════════════════════

I need to manually set showDivider to either true or false. The default true value isn't working

OBS: version 1.7.3

[Fernando de Oliveira Santos]

As per my debug, the ScrollPicker class constructor should be

ScrollPicker({
    Key key,
    @required this.items,
    @required this.initialValue,
    @required this.onChanged,
    **bool showDivider,**
  })  : assert(items != null),
        **showDivider = showDivider ?? true,**
        super(key: key);

instead of

ScrollPicker({
    Key key,
    @required this.items,
    @required this.initialValue,
    @required this.onChanged,
    this.showDivider: true,
  })  : assert(items != null),
        super(key: key);

[CodeGrue]

Fixed in 1.7.4