Uast: Ability to get the default class type from UClass

plugins/uast-java/src/org/jetbrains/uast/java/declarations/JavaUClass.kt

@@ -16,6 +16,7 @@
 package org.jetbrains.uast.java
 
 import com.intellij.psi.*
+import com.intellij.psi.util.PsiTypesUtil
 import org.jetbrains.uast.*
 import org.jetbrains.uast.kinds.UastClassKind
 import org.jetbrains.uast.psi.PsiElementBacked
@@ -50,6 +51,8 @@ class JavaUClass(
         }
     }
 
+    override val defaultType by lz { JavaConverter.convert(PsiTypesUtil.getClassType(psi), this) }
+
     override val companions: List<UClass>
         get() = emptyList()