Dart: do not render conversion imports for typedef files

The file, which contains only a global typedef does not need
to include conversion imports. They cause unused imports
warning.

Signed-off-by: Patryk Wrobel <183546751+pwrobeldev@users.noreply.github.com>

Author: pwrobeldev

gluecodium/src/main/java/com/here/gluecodium/generator/dart/DartGenerator.kt

@@ -258,11 +258,13 @@ internal class DartGenerator : Generator {
         val optimizedLists = OptimizedListsCollector().getAllOptimizedLists(rootElement)
 
         val imports = importCollectors.flatMap { it.collectImports(rootElement) }
+        val nonConversionImports = imports.filterNot { it.filePath.endsWith("__conversion") }
         val content =
             TemplateEngine.render(
                 "dart/DartFile",
                 mapOf(
                     "imports" to imports.distinct().sorted().filterNot { it.filePath.endsWith(filePath) },
+                    "nonConversionImports" to nonConversionImports.distinct().sorted().filterNot { it.filePath.endsWith(filePath) },
                     "model" to rootElement,
                     "contentTemplate" to contentTemplateName,
                     "libraryName" to libraryName,

gluecodium/src/main/resources/templates/dart/DartFile.mustache

@@ -20,9 +20,16 @@
   !}}
 {{#if copyrightHeader}}{{prefix copyrightHeader "// "}}{{/if}}
 
+{{#instanceOf model "LimeTypeAlias"}}
+{{#nonConversionImports}}
+{{>dart/DartImport}}
+{{/nonConversionImports}}
+{{/instanceOf}}
+{{#notInstanceOf model "LimeTypeAlias"}}
 {{#imports}}
 {{>dart/DartImport}}
 {{/imports}}
+{{/notInstanceOf}}
 
 {{#model}}
 {{include contentTemplate}}

gluecodium/src/test/resources/smoke/typedefs/output/dart/lib/src/smoke/global_list_type_def.dart

@@ -1,6 +1,5 @@
 
 
-import 'package:library/src/generic_types__conversion.dart';
 
 /// This is some standalone list typedef.
 typedef GlobalListTypeDef = List<double>;

gluecodium/src/test/resources/smoke/typedefs/output/dart/lib/src/smoke/global_map_type_def.dart

@@ -1,6 +1,5 @@
 
 
-import 'package:library/src/generic_types__conversion.dart';
 
 /// This is some standalone map typedef.
 typedef GlobalMapTypeDef = Map<int, String>;