Quick Fixes: Support cross-language "Create from Usage" with Kotlin target

plugins/uast-kotlin/src/org/jetbrains/uast/kotlin/declarations/KotlinUClass.kt

@@ -72,6 +72,8 @@ open class KotlinUClass private constructor(
 
     override val psi = unwrap<UClass, PsiClass>(psi)
 
+    override fun getSourceElement() = sourcePsi ?: this
+
     override fun getOriginalElement(): PsiElement? = super.getOriginalElement()
 
     override fun getNameIdentifier(): PsiIdentifier? = UastLightIdentifier(psi, ktClass)

plugins/uast-kotlin/src/org/jetbrains/uast/kotlin/declarations/KotlinUMethod.kt

@@ -42,6 +42,8 @@ open class KotlinUMethod(
 
     override val sourcePsi = psi.kotlinOrigin
 
+    override fun getSourceElement() = sourcePsi ?: this
+
     override val uastDefaultValue by lz {
         val annotationParameter = psi.kotlinOrigin as? KtParameter ?: return@lz null
         val defaultValue = annotationParameter.defaultValue ?: return@lz null

plugins/uast-kotlin/src/org/jetbrains/uast/kotlin/declarations/KotlinUVariable.kt

@@ -269,6 +269,7 @@ open class KotlinUField(
         override val sourcePsi: KtElement?,
         givenParent: UElement?
 ) : AbstractKotlinUVariable(givenParent), UField, PsiField by psi {
+    override fun getSourceElement() = sourcePsi ?: this
 
     override val javaPsi  = unwrap<UField, PsiField>(psi)