fix: build against 2023.1 for constructor compatibility (#823)

Signed-off-by: Andre Dietisheim <[email protected]>

Author: adietish

gradle.properties

@@ -5,7 +5,7 @@ jetBrainsChannel=stable
 # IntelliJ Platform Properties -> https://plugins.jetbrains.com/docs/intellij/tools-gradle-intellij-plugin.html#configuration-intellij-extension
 # if plugin uses intellij-common-ui-test library, 'platformType' and 'platformVersion' variables names MUST be used
 # platformType = IC (not needed as hard-coded in gradle build directly)
-platformVersion=2024.3
+platformVersion=2023.1
 
 # Gradle Releases -> https://github.com/gradle/gradle/releases
 gradleVersion=8.5

src/main/kotlin/com/redhat/devtools/intellij/kubernetes/editor/ResourceDiff.kt

@@ -52,7 +52,7 @@ open class ResourceDiff(private val project: Project) {
         }
     }
 
-    private fun createDiffRequestChain(file: VirtualFile, toCompare: String): MutableDiffRequestChain? {
+    private fun createDiffRequestChain(file: VirtualFile, toCompare: String): MutableDiffRequestChain {
         val contentFactory = DiffContentFactory.getInstance()
         val left = contentFactory.create(project, file)
         val right = contentFactory.create(project, toCompare, file.fileType)