Working on trying to pass objects, unwrap them to C/C++ types, do something, then return the result as an object. Now I get why people say JNI is tricky

.idea/codeStyles/Project.xml

@@ -1,8 +1,5 @@
 <component name="ProjectCodeStyleConfiguration">
   <code_scheme name="Project" version="173">
-    <AndroidXmlCodeStyleSettings>
-      <option name="ARRANGEMENT_SETTINGS_MIGRATED_TO_191" value="true" />
-    </AndroidXmlCodeStyleSettings>
     <JetCodeStyleSettings>
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
     </JetCodeStyleSettings>

.idea/dictionaries/phoenix.xml

@@ -1,3 +0,0 @@
-<component name="ProjectDictionaryState">
-  <dictionary name="phoenix" />
-</component>

.idea/encodings.xml

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="Encoding" addBOMForNewFiles="with NO BOM" />
-</project>

.idea/gradle.xml

@@ -12,6 +12,7 @@
           </set>
         </option>
         <option name="resolveModulePerSourceSet" value="false" />
+        <option name="testRunner" value="PLATFORM" />
       </GradleProjectSettings>
     </option>
   </component>

.idea/modules/mear.iml

@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module external.linked.project.id="mear" external.linked.project.path="$MODULE_DIR$/../.." external.root.project.path="$MODULE_DIR$/../.." external.system.id="GRADLE" external.system.module.group="" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager">
-    <exclude-output />
-    <content url="file://$MODULE_DIR$/../..">
-      <excludeFolder url="file://$MODULE_DIR$/../../.gradle" />
-      <excludeFolder url="file://$MODULE_DIR$/../../build" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>

.idea/render.experimental.xml

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RenderSettings">
-    <option name="quality" value="0.0" />
-    <option name="showDecorations" value="true" />
-  </component>
-</project>

.idea/vcs.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+    <mapping directory="" vcs="Git" />
     <mapping directory="$PROJECT_DIR$/app/src/main/cpp/3rdparty/SQLiteCpp" vcs="Git" />
     <mapping directory="$PROJECT_DIR$/app/src/main/cpp/3rdparty/SQLiteCpp/googletest" vcs="Git" />
     <mapping directory="$PROJECT_DIR$/app/src/main/cpp/3rdparty/json" vcs="Git" />