https://www.graalvm.org/ 
class com.oracle.svm.core.genscavenge.PinnedObjectImpl$PinnedObjectFeature implements org.graalvm.nativeimage.hosted.Feature
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.svm.core.genscavenge.PinnedObjectImpl$PinnedObjectFeature
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.svm.core.genscavenge.PinnedObjectImpl$PinnedObjectFeature this
         0: .line 71
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.svm.core.genscavenge.PinnedObjectImpl$PinnedObjectFeature this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/svm/core/genscavenge/PinnedObjectImpl$PinnedObjectFeature;

  public boolean isInConfiguration(org.graalvm.nativeimage.hosted.Feature$IsInConfigurationAccess);
    descriptor: (Lorg/graalvm/nativeimage/hosted/Feature$IsInConfigurationAccess;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // com.oracle.svm.core.genscavenge.PinnedObjectImpl$PinnedObjectFeature this
        start local 1 // org.graalvm.nativeimage.hosted.Feature$IsInConfigurationAccess access
         0: .line 74
            getstatic com.oracle.svm.core.SubstrateOptions.UseCardRememberedSetHeap:Lcom/oracle/svm/core/option/HostedOptionKey;
            invokevirtual com.oracle.svm.core.option.HostedOptionKey.getValue:()Ljava/lang/Object;
            checkcast java.lang.Boolean
            invokevirtual java.lang.Boolean.booleanValue:()Z
            ireturn
        end local 1 // org.graalvm.nativeimage.hosted.Feature$IsInConfigurationAccess access
        end local 0 // com.oracle.svm.core.genscavenge.PinnedObjectImpl$PinnedObjectFeature this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    1     0    this  Lcom/oracle/svm/core/genscavenge/PinnedObjectImpl$PinnedObjectFeature;
            0    1     1  access  Lorg/graalvm/nativeimage/hosted/Feature$IsInConfigurationAccess;
    MethodParameters:
        Name  Flags
      access  

  public void afterRegistration(org.graalvm.nativeimage.hosted.Feature$AfterRegistrationAccess);
    descriptor: (Lorg/graalvm/nativeimage/hosted/Feature$AfterRegistrationAccess;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.oracle.svm.core.genscavenge.PinnedObjectImpl$PinnedObjectFeature this
        start local 1 // org.graalvm.nativeimage.hosted.Feature$AfterRegistrationAccess access
         0: .line 79
            ldc Lorg/graalvm/nativeimage/impl/PinnedObjectSupport;
            new com.oracle.svm.core.genscavenge.PinnedObjectImpl$PinnedObjectSupportImpl
            dup
            invokespecial com.oracle.svm.core.genscavenge.PinnedObjectImpl$PinnedObjectSupportImpl.<init>:()V
            invokestatic org.graalvm.nativeimage.ImageSingletons.add:(Ljava/lang/Class;Ljava/lang/Object;)V
         1: .line 80
            return
        end local 1 // org.graalvm.nativeimage.hosted.Feature$AfterRegistrationAccess access
        end local 0 // com.oracle.svm.core.genscavenge.PinnedObjectImpl$PinnedObjectFeature this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    2     0    this  Lcom/oracle/svm/core/genscavenge/PinnedObjectImpl$PinnedObjectFeature;
            0    2     1  access  Lorg/graalvm/nativeimage/hosted/Feature$AfterRegistrationAccess;
    MethodParameters:
        Name  Flags
      access  
}
SourceFile: "PinnedObjectImpl.java"
NestHost: com.oracle.svm.core.genscavenge.PinnedObjectImpl
InnerClasses:
  PinnedObjectFeature = com.oracle.svm.core.genscavenge.PinnedObjectImpl$PinnedObjectFeature of com.oracle.svm.core.genscavenge.PinnedObjectImpl
  PinnedObjectSupportImpl = com.oracle.svm.core.genscavenge.PinnedObjectImpl$PinnedObjectSupportImpl of com.oracle.svm.core.genscavenge.PinnedObjectImpl
  public abstract AfterRegistrationAccess = org.graalvm.nativeimage.hosted.Feature$AfterRegistrationAccess of org.graalvm.nativeimage.hosted.Feature
  public abstract IsInConfigurationAccess = org.graalvm.nativeimage.hosted.Feature$IsInConfigurationAccess of org.graalvm.nativeimage.hosted.Feature
    RuntimeVisibleAnnotations: 
      com.oracle.svm.core.annotate.AutomaticFeature()