src/jdk.jdi/share/classes/com/sun/tools/jdi/VirtualMachineImpl.java

*** 833,10 ***
--- 833,14 ---
  
      boolean mayCreateVirtualThreads() {
          return versionInfo().jdwpMajor >= 19;
      }
  
+     public boolean supportsValueClasses() {
+         return versionInfo().jdwpMajor >= 27;
+     }
+ 
      public void setDebugTraceMode(int traceFlags) {
          validateVM();
          this.traceFlags = traceFlags;
          this.traceReceives = (traceFlags & TRACE_RECEIVES) != 0;
      }