style: format code for better readability in FormBuilderSearchableMultiSelectDropdown and its tests

Author: jesse-shaw-egeo

lib/src/fields/form_builder_searchable_multiselect_dropdown.dart

@@ -3,7 +3,8 @@ import 'package:flutter/material.dart';
 import 'package:flutter_form_builder/flutter_form_builder.dart';
 
 /// Field for selecting value(s) from a searchable list
-class FormBuilderSearchableMultiSelectDropdown<T> extends FormBuilderFieldDecoration<List<T>> {
+class FormBuilderSearchableMultiSelectDropdown<T>
+    extends FormBuilderFieldDecoration<List<T>> {
   ///offline items list
   final List<T> items;
 
@@ -47,7 +48,8 @@ class FormBuilderSearchableMultiSelectDropdown<T> extends FormBuilderFieldDecora
   final DropdownSearchPopupItemBuilder<T>? popupSelectionWidget;
 
   ///widget used to validate items in multiSelection mode
-  final ValidationMultiSelectionBuilder<T?>? popupValidationMultiSelectionWidget;
+  final ValidationMultiSelectionBuilder<T?>?
+  popupValidationMultiSelectionWidget;
 
   ///widget to add custom widget like addAll/removeAll on popup multi selection mode
   final ValidationMultiSelectionBuilder<T>? popupCustomMultiSelectionWidget;
@@ -94,7 +96,10 @@ class FormBuilderSearchableMultiSelectDropdown<T> extends FormBuilderFieldDecora
     this.popupOnItemRemoved,
     this.popupSelectionWidget,
     this.selectedItems = const [],
-    this.popupProps = const PopupPropsMultiSelection.menu(showSearchBox: true, fit: FlexFit.loose),
+    this.popupProps = const PopupPropsMultiSelection.menu(
+      showSearchBox: true,
+      fit: FlexFit.loose,
+    ),
     this.clearButtonProps,
     this.dropdownSearchTextStyle,
     this.dropdownButtonProps,
@@ -104,10 +109,13 @@ class FormBuilderSearchableMultiSelectDropdown<T> extends FormBuilderFieldDecora
        popupValidationMultiSelectionWidget = null,
        super(
          builder: (field) {
-           final state = field as FormBuilderSearchableMultiSelectDropdownState<T>;
+           final state =
+               field as FormBuilderSearchableMultiSelectDropdownState<T>;
            return DropdownSearch<T>.multiSelection(
              autoValidateMode: autovalidateMode,
-             items: (filter, infiniteScrollProps) => asyncItems == null ? items : asyncItems(filter, infiniteScrollProps),
+             items: (filter, infiniteScrollProps) => asyncItems == null
+                 ? items
+                 : asyncItems(filter, infiniteScrollProps),
              decoratorProps: DropDownDecoratorProps(
                decoration: state.decoration,
                textAlign: dropdownSearchTextAlign,
@@ -116,7 +124,8 @@ class FormBuilderSearchableMultiSelectDropdown<T> extends FormBuilderFieldDecora
              ),
              suffixProps: DropdownSuffixProps(
                clearButtonProps: clearButtonProps ?? const ClearButtonProps(),
-               dropdownButtonProps: dropdownButtonProps ?? const DropdownButtonProps(),
+               dropdownButtonProps:
+                   dropdownButtonProps ?? const DropdownButtonProps(),
              ),
              enabled: state.enabled,
              filterFn: filterFn,
@@ -134,7 +143,16 @@ class FormBuilderSearchableMultiSelectDropdown<T> extends FormBuilderFieldDecora
        );
 
   @override
-  FormBuilderFieldDecorationState<FormBuilderSearchableMultiSelectDropdown<T>, List<T>> createState() => FormBuilderSearchableMultiSelectDropdownState<T>();
+  FormBuilderFieldDecorationState<
+    FormBuilderSearchableMultiSelectDropdown<T>,
+    List<T>
+  >
+  createState() => FormBuilderSearchableMultiSelectDropdownState<T>();
 }
 
-class FormBuilderSearchableMultiSelectDropdownState<T> extends FormBuilderFieldDecorationState<FormBuilderSearchableMultiSelectDropdown<T>, List<T>> {}
+class FormBuilderSearchableMultiSelectDropdownState<T>
+    extends
+        FormBuilderFieldDecorationState<
+          FormBuilderSearchableMultiSelectDropdown<T>,
+          List<T>
+        > {}