src/java.base/share/classes/java/lang/invoke/MethodHandleImpl.java

*** 1782,1791 ****
--- 1782,1796 ----
              @Override
              public String getName(Object mname) {
                  MemberName memberName = (MemberName)mname;
                  return memberName.getName();
              }
+             @Override
+             public Class<?> getDeclaringClass(Object mname) {
+                 MemberName memberName = (MemberName)mname;
+                 return memberName.getDeclaringClass();
+             }
  
              @Override
              public MethodType getMethodType(Object mname) {
                  MemberName memberName = (MemberName)mname;
                  return memberName.getMethodType();