https://www.graalvm.org/ 
abstract class com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheEntry extends com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheNode
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheEntry
  super_class: com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheNode
{
  com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheEntry next;
    descriptor: Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$KeyCacheEntry;
    flags: (0x0000) 
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.nodes.Node$Child()

  void <init>(com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheEntry);
    descriptor: (Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$KeyCacheEntry;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheEntry this
        start local 1 // com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheEntry next
         0: .line 581
            aload 0 /* this */
            invokespecial com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheNode.<init>:()V
         1: .line 582
            aload 0 /* this */
            aload 1 /* next */
            putfield com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheEntry.next:Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$KeyCacheEntry;
         2: .line 583
            return
        end local 1 // com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheEntry next
        end local 0 // com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheEntry this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$KeyCacheEntry;
            0    3     1  next  Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$KeyCacheEntry;
    MethodParameters:
      Name  Flags
      next  

  public boolean acceptsKey(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheEntry this
        start local 1 // java.lang.Object key
         0: .line 586
            iconst_1
            ireturn
        end local 1 // java.lang.Object key
        end local 0 // com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheEntry this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$KeyCacheEntry;
            0    1     1   key  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      key   
}
SourceFile: "DynamicObjectLibraryImpl.java"
NestHost: com.oracle.truffle.object.DynamicObjectLibraryImpl
InnerClasses:
  public abstract Child = com.oracle.truffle.api.nodes.Node$Child of com.oracle.truffle.api.nodes.Node
  abstract KeyCacheEntry = com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheEntry of com.oracle.truffle.object.DynamicObjectLibraryImpl
  abstract KeyCacheNode = com.oracle.truffle.object.DynamicObjectLibraryImpl$KeyCacheNode of com.oracle.truffle.object.DynamicObjectLibraryImpl