Changed to ConcurrentSkipListMap to preserve order

src/main/java/rife/bld/extension/dokka/SourceSet.java

@@ -24,7 +24,7 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentSkipListMap;
 import java.util.stream.Collectors;
 
 /**
@@ -33,15 +33,16 @@ import java.util.stream.Collectors;
  * @author <a href="https://erik.thauvin.net/">Erik C. Thauvin</a>
  * @since 1.0
  */
+@SuppressWarnings("PMD.UseConcurrentHashMap")
 public class SourceSet {
     private final Collection<File> classpath_ = new ArrayList<>();
-    private final Map<String, String> dependentSourceSets_ = new ConcurrentHashMap<>();
+    private final Map<String, String> dependentSourceSets_ = new ConcurrentSkipListMap<>();
     private final Collection<DocumentedVisibility> documentedVisibilities_ = new ArrayList<>();
-    private final Map<String, String> externalDocumentationLinks_ = new ConcurrentHashMap<>();
+    private final Map<String, String> externalDocumentationLinks_ = new ConcurrentSkipListMap<>();
     private final Collection<File> includes_ = new ArrayList<>();
     private final Collection<String> perPackageOptions_ = new ArrayList<>();
     private final Collection<File> samples_ = new ArrayList<>();
-    private final Map<String, String> srcLinks_ = new ConcurrentHashMap<>();
+    private final Map<String, String> srcLinks_ = new ConcurrentSkipListMap<>();
     private final Collection<File> src_ = new ArrayList<>();
     private final Collection<File> suppressedFiles_ = new ArrayList<>();
     private AnalysisPlatform analysisPlatform_;

src/test/java/rife/bld/extension/dokka/SourceSetTest.java

@@ -171,7 +171,7 @@ class SourceSetTest {
         var matches = List.of(
                 "-classpath", localPath(PATH_1, PATH_2),
                 "-dependentSourceSets", "set1/set2;set3/set4",
-                "-externalDocumentationLinks", "link3^link4^^link1^link2",
+                "-externalDocumentationLinks", "link1^link2^^link3^link4",
                 "-perPackageOptions", OPTION_1 + ';' + OPTION_2,
                 "-samples", localPath(SAMPLES_1, SAMPLES_2, SAMPLES_3),
                 "-suppressedFiles", localPath(SUP_1, SUP_2, SUP_3)