Release mode: add some codeoptimization to look how it behaves

app/proguard-rules.pro

@@ -0,0 +1,26 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.kts.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# JNA
+-keep class com.sun.jna.** { *; }
+-keep class * implements com.sun.jna.** { *; }
+
+# kotlinx.serialization
+
+# Kotlin serialization looks up the generated serializer classes through a function on companion
+# objects. The companions are looked up reflectively so we need to explicitly keep these functions.
+-keepclasseswithmembers class **.*$Companion {
+    kotlinx.serialization.KSerializer serializer(...);
+}
+# If a companion has the serializer function, keep the companion field on the original type so that
+# the reflective lookup succeeds.
+-if class **.*$Companion {
+  kotlinx.serialization.KSerializer serializer(...);
+}
+-keepclassmembers class <1>.<2> {
+  <1>.<2>$Companion Companion;
+}