Worked on the margin between flag and the country name and also ensured sound-null saftey is enabled

lib/country_code_picker.dart

@@ -19,6 +19,7 @@ class CountryCodePicker extends StatefulWidget {
   final List<String> favorite;
   final TextStyle? textStyle;
   final EdgeInsetsGeometry padding;
+  final EdgeInsetsGeometry? margin;
   final bool showCountryOnly;
   final InputDecoration searchDecoration;
   final TextStyle? searchStyle;
@@ -99,6 +100,7 @@ class CountryCodePicker extends StatefulWidget {
     this.favorite = const [],
     this.textStyle,
     this.padding = const EdgeInsets.all(8.0),
+    this.margin,
     this.showCountryOnly = false,
     this.searchDecoration = const InputDecoration(),
     this.searchStyle,
@@ -127,7 +129,8 @@ class CountryCodePicker extends StatefulWidget {
     this.dialogBackgroundColor,
     this.closeIcon = const Icon(Icons.close),
     this.countryList = codes,
-    this.dialogItemPadding = const EdgeInsets.symmetric(horizontal: 24, vertical: 8),
+    this.dialogItemPadding =
+        const EdgeInsets.symmetric(horizontal: 24, vertical: 8),
     this.searchPadding = const EdgeInsets.symmetric(horizontal: 24),
     Key? key,
   }) : super(key: key);
@@ -194,9 +197,10 @@ class CountryCodePickerState extends State<CountryCodePicker> {
                         ? Clip.none
                         : Clip.hardEdge,
                     decoration: widget.flagDecoration,
-                    margin: widget.alignLeft
-                        ? const EdgeInsets.only(right: 16.0, left: 8.0)
-                        : const EdgeInsets.only(right: 16.0),
+                    margin: widget.margin ??
+                        (widget.alignLeft
+                            ? const EdgeInsets.only(right: 16.0, left: 8.0)
+                            : const EdgeInsets.only(right: 16.0)),
                     child: Image.asset(
                       selectedItem!.flagUri!,
                       package: 'country_code_picker',
@@ -221,9 +225,9 @@ class CountryCodePickerState extends State<CountryCodePicker> {
                   flex: widget.alignLeft ? 0 : 1,
                   fit: widget.alignLeft ? FlexFit.tight : FlexFit.loose,
                   child: Padding(
-                      padding: widget.alignLeft
+                      padding: (widget.alignLeft
                           ? const EdgeInsets.only(right: 16.0, left: 8.0)
-                          : const EdgeInsets.only(right: 16.0),
+                          : const EdgeInsets.only(right: 16.0)),
                       child: Icon(
                         Icons.arrow_drop_down,
                         color: Colors.grey,