https://www.graalvm.org/ 
public interface com.oracle.svm.core.SubstrateUtil$DiagnosticThunk
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.svm.core.SubstrateUtil$DiagnosticThunk
  super_class: java.lang.Object
{
  public abstract void invokeWithoutAllocation(com.oracle.svm.core.log.Log);
    descriptor: (Lcom/oracle/svm/core/log/Log;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    RuntimeVisibleAnnotations: 
      com.oracle.svm.core.annotate.RestrictHeapAccess(access = com.oracle.svm.core.annotate.RestrictHeapAccess$Access.NO_ALLOCATION:Lcom/oracle/svm/core/annotate/RestrictHeapAccess$Access;, reason = "Must not allocate during printing diagnostics.")
    MethodParameters:
      Name  Flags
      log   
}
SourceFile: "SubstrateUtil.java"
NestHost: com.oracle.svm.core.SubstrateUtil
InnerClasses:
  public abstract DiagnosticThunk = com.oracle.svm.core.SubstrateUtil$DiagnosticThunk of com.oracle.svm.core.SubstrateUtil
  public final Access = com.oracle.svm.core.annotate.RestrictHeapAccess$Access of com.oracle.svm.core.annotate.RestrictHeapAccess
    RuntimeVisibleAnnotations: 
      java.lang.FunctionalInterface()