fix(dart): models empty sub_schema array scenario

Author: loks0n

templates/dart/lib/src/models/model.dart.twig

@@ -6,11 +6,12 @@ class {{ definition.name | caseUcfirst | overrideIdentifier }} implements Model
 {% for property in definition.properties %}
     /// {{ property.description }}
     final {% if not property.required %}{{_self.sub_schema(property)}}? {{ property.name | escapeKeyword }}{% else %}{{_self.sub_schema(property)}} {{ property.name | escapeKeyword }}{% endif %};
+
 {% endfor %}
-{% if definition.additionalProperties %}
+{%~ if definition.additionalProperties %}
     final Map<String, dynamic> data;
-{% endif %}
 
+{% endif %}
     {{ definition.name | caseUcfirst | overrideIdentifier}}({% if definition.properties | length or definition.additionalProperties %}{{ '{' }}{% endif %}
 
 {% for property in definition.properties %}
@@ -33,7 +34,7 @@ class {{ definition.name | caseUcfirst | overrideIdentifier }} implements Model
                 {%- endif -%}
             {%- else -%}
                 {%- if property.type == 'array' -%}
-                    List<{{ property.items.type | caseUcfirst }}>.from(map['{{property.name | escapeDollarSign }}']?.map((x) => x{% if property.items.type == "string" %}.toString(){% endif %}) ?? [])
+                    List.from(map['{{property.name | escapeDollarSign }}'] ?? [])
                 {%- else -%}
                     map['{{property.name | escapeDollarSign }}']
                     {%- if property.type == "number" -%}
@@ -76,4 +77,4 @@ class {{ definition.name | caseUcfirst | overrideIdentifier }} implements Model
 {% endfor %}
 {% endif %}
 {% endfor %}
-}
+}