[serde-gson] Support for Gson readers and writers

test-utils/generic/build.gradle.kts

@@ -0,0 +1,3 @@
+plugins {
+	id("de.siphalor.tweed5.test-utils")
+}

test-utils/generic/src/main/java/de/siphalor/tweed5/testutils/generic/MapTestUtils.java

@@ -0,0 +1,11 @@
+package de.siphalor.tweed5.testutils.generic;
+
+import java.util.*;
+
+public class MapTestUtils {
+	public static <K, V> SequencedMap<K, V> sequencedMap(Collection<Map.Entry<K, V>> entries) {
+		var map = LinkedHashMap.<K, V>newLinkedHashMap(entries.size());
+		entries.forEach(entry -> map.put(entry.getKey(), entry.getValue()));
+		return Collections.unmodifiableSequencedMap(map);
+	}
+}