Test it's safe to call PsiElement methods on Kotlin light elements

compiler/light-classes/src/org/jetbrains/kotlin/asJava/KotlinLightTypeParameterListBuilder.kt

@@ -27,4 +27,6 @@ public class KotlinLightTypeParameterListBuilder(manager: PsiManager): LightType
     override fun processDeclarations(processor: PsiScopeProcessor, state: ResolveState, lastParent: PsiElement?, place: PsiElement): Boolean {
         return getTypeParameters().all { processor.execute(it, state) }
     }
+
+    override fun getText(): String? = ""
 }

compiler/light-classes/src/org/jetbrains/kotlin/asJava/KtLightField.kt

@@ -69,9 +69,9 @@ sealed class KtLightFieldImpl(
 
     override fun hasModifierProperty(@NonNls name: String) = delegate.hasModifierProperty(name)
 
-    override fun getText() = delegate.text
+    override fun getText() = origin?.text ?: ""
 
-    override fun getTextRange() = TextRange(-1, -1)
+    override fun getTextRange() = origin?.textRange ?: TextRange.EMPTY_RANGE
 
     override fun isValid() = containingClass.isValid
 
@@ -82,7 +82,7 @@ sealed class KtLightFieldImpl(
     override fun getDelegate() = delegate
 
     override fun getNavigationElement() = origin ?: super.getNavigationElement()
-
+    
     override fun isEquivalentTo(another: PsiElement?): Boolean {
         if (another is KtLightField && origin == another.getOrigin() && delegate == another.getDelegate()) {
             return true

compiler/light-classes/src/org/jetbrains/kotlin/asJava/KtLightMethod.kt

@@ -17,6 +17,7 @@
 package org.jetbrains.kotlin.asJava
 
 import com.intellij.core.JavaCoreBundle
+import com.intellij.openapi.util.TextRange
 import com.intellij.psi.*
 import com.intellij.psi.impl.light.LightMethod
 import com.intellij.psi.scope.PsiScopeProcessor
@@ -68,6 +69,8 @@ sealed class KtLightMethodImpl(
     override fun getDelegate() = delegate
     override fun getOrigin() = origin
     override fun getParent(): PsiElement? = containingClass
+    override fun getText() = origin?.text ?: ""
+    override fun getTextRange() = origin?.textRange ?: TextRange.EMPTY_RANGE 
 
     override fun accept(visitor: PsiElementVisitor) {
         if (visitor is JavaElementVisitor) {
@@ -140,7 +143,7 @@ sealed class KtLightMethodImpl(
     override fun hashCode(): Int = ((name.hashCode() * 31 + (origin?.hashCode() ?: 0)) * 31 + containingClass.hashCode()) * 31 + delegate.hashCode()
 
     override fun toString(): String = "${this.javaClass.simpleName}:$name"
-
+    
     private class KtLightMethodForDeclaration(
             delegate: PsiMethod, origin: KtDeclaration?, containingClass: KtLightClass
     ) : KtLightMethodImpl(delegate, origin, containingClass)

compiler/light-classes/src/org/jetbrains/kotlin/asJava/KtLightParameter.java

@@ -135,4 +135,9 @@ public class KtLightParameter extends LightParameter implements KtLightElement<K
     public KtLightMethod getMethod() {
         return method;
     }
+
+    @Override
+    public String getText() {
+        return "";
+    }
 }

compiler/light-classes/src/org/jetbrains/kotlin/asJava/KtLightTypeParameter.java

@@ -80,6 +80,11 @@ public class KtLightTypeParameter
         }
     }
 
+    @Override
+    public String getText() {
+        return "";
+    }
+
     @Nullable
     @Override
     public String getName() {

compiler/light-classes/src/org/jetbrains/kotlin/asJava/KtWrappingLightClass.java

@@ -155,7 +155,7 @@ public abstract class KtWrappingLightClass extends AbstractLightClass implements
     @Override
     public String getText() {
         KtClassOrObject origin = getOrigin();
-        return origin == null ? null : origin.getText();
+        return origin == null ? "" : origin.getText();
     }
 
     @NotNull