toString impls for debug

src/org/jetbrains/java/decompiler/struct/StructClass.java

@@ -194,4 +194,9 @@ public class StructClass extends StructMember {
 
     return CodeConstants.BYTECODE_JAVA_LE_4;
   }
+
+  @Override
+  public String toString() {
+    return qualifiedName;
+  }
 }

src/org/jetbrains/java/decompiler/struct/StructField.java

@@ -55,4 +55,9 @@ public class StructField extends StructMember {
   public String getDescriptor() {
     return descriptor;
   }
+
+  @Override
+  public String toString() {
+    return name;
+  }
 }

src/org/jetbrains/java/decompiler/struct/StructMethod.java

@@ -393,4 +393,9 @@ public class StructMethod extends StructMember {
   public StructLocalVariableTableAttribute getLocalVariableAttr() {
     return (StructLocalVariableTableAttribute)getAttributes().getWithKey(StructGeneralAttribute.ATTRIBUTE_LOCAL_VARIABLE_TABLE);
   }
+
+  @Override
+  public String toString() {
+    return name;
+  }
 }