https://www.graalvm.org/ 
final class com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl implements com.oracle.truffle.js.runtime.util.JSHashMap$Cursor
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl
  super_class: java.lang.Object
{
  private com.oracle.truffle.js.runtime.util.JSHashMap$Node current;
    descriptor: Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
    flags: (0x0002) ACC_PRIVATE

  static final boolean $assertionsDisabled;
    descriptor: Z
    flags: (0x1018) ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 162
            ldc Lcom/oracle/truffle/js/runtime/util/JSHashMap;
            invokevirtual java.lang.Class.desiredAssertionStatus:()Z
            ifne 1
            iconst_1
            goto 2
      StackMap locals:
      StackMap stack:
         1: iconst_0
      StackMap locals:
      StackMap stack: int
         2: putstatic com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.$assertionsDisabled:Z
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>(com.oracle.truffle.js.runtime.util.JSHashMap$Node);
    descriptor: (Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl this
        start local 1 // com.oracle.truffle.js.runtime.util.JSHashMap$Node head
         0: .line 165
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 166
            aload 0 /* this */
            aload 1 /* head */
            putfield com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.current:Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
         2: .line 167
            return
        end local 1 // com.oracle.truffle.js.runtime.util.JSHashMap$Node head
        end local 0 // com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/js/runtime/util/JSHashMap$CursorImpl;
            0    3     1  head  Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
    MethodParameters:
      Name  Flags
      head  

  public boolean advance();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl this
         0: .line 171
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.current:Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
            ifnonnull 3
         1: .line 172
            iconst_0
            ireturn
         2: .line 176
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.current:Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
            invokevirtual com.oracle.truffle.js.runtime.util.JSHashMap$Node.getPrev:()Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
            putfield com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.current:Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
         3: .line 175
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.current:Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
            invokevirtual com.oracle.truffle.js.runtime.util.JSHashMap$Node.isEmpty:()Z
            ifeq 4
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.current:Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
            invokevirtual com.oracle.truffle.js.runtime.util.JSHashMap$Node.getPrev:()Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
            ifnonnull 2
         4: .line 178
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.current:Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
            invokevirtual com.oracle.truffle.js.runtime.util.JSHashMap$Node.getNext:()Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
            astore 1 /* next */
        start local 1 // com.oracle.truffle.js.runtime.util.JSHashMap$Node next
         5: .line 179
            getstatic com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.$assertionsDisabled:Z
            ifne 6
            aload 1 /* next */
            ifnull 6
            aload 1 /* next */
            invokevirtual com.oracle.truffle.js.runtime.util.JSHashMap$Node.getKey:()Ljava/lang/Object;
            ifnonnull 6
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         6: .line 180
      StackMap locals: com.oracle.truffle.js.runtime.util.JSHashMap$Node
      StackMap stack:
            aload 0 /* this */
            aload 1 /* next */
            putfield com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.current:Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
         7: .line 181
            aload 1 /* next */
            ifnull 8
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         8: iconst_0
            ireturn
        end local 1 // com.oracle.truffle.js.runtime.util.JSHashMap$Node next
        end local 0 // com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    9     0  this  Lcom/oracle/truffle/js/runtime/util/JSHashMap$CursorImpl;
            5    9     1  next  Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;

  public java.lang.Object getKey();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl this
         0: .line 187
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.current:Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
            invokevirtual com.oracle.truffle.js.runtime.util.JSHashMap$Node.getKey:()Ljava/lang/Object;
            astore 1 /* key */
        start local 1 // java.lang.Object key
         1: .line 188
            getstatic com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.$assertionsDisabled:Z
            ifne 2
            aload 1 /* key */
            ifnonnull 2
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         2: .line 189
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 1 /* key */
            areturn
        end local 1 // java.lang.Object key
        end local 0 // com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/js/runtime/util/JSHashMap$CursorImpl;
            1    3     1   key  Ljava/lang/Object;

  public java.lang.Object getValue();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl this
         0: .line 194
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.current:Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
            invokevirtual com.oracle.truffle.js.runtime.util.JSHashMap$Node.getValue:()Ljava/lang/Object;
            astore 1 /* value */
        start local 1 // java.lang.Object value
         1: .line 195
            getstatic com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.$assertionsDisabled:Z
            ifne 2
            aload 1 /* value */
            ifnonnull 2
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         2: .line 196
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 1 /* value */
            areturn
        end local 1 // java.lang.Object value
        end local 0 // com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lcom/oracle/truffle/js/runtime/util/JSHashMap$CursorImpl;
            1    3     1  value  Ljava/lang/Object;

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl this
         0: .line 201
            new java.lang.StringBuilder
            dup
            ldc "Cursor [current="
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.current:Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            ldc "]"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/runtime/util/JSHashMap$CursorImpl;

  public com.oracle.truffle.js.runtime.util.JSHashMap$Cursor copy();
    descriptor: ()Lcom/oracle/truffle/js/runtime/util/JSHashMap$Cursor;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl this
         0: .line 206
            new com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl
            dup
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.current:Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;
            invokespecial com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl.<init>:(Lcom/oracle/truffle/js/runtime/util/JSHashMap$Node;)V
            areturn
        end local 0 // com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/runtime/util/JSHashMap$CursorImpl;
}
SourceFile: "JSHashMap.java"
NestHost: com.oracle.truffle.js.runtime.util.JSHashMap
InnerClasses:
  public abstract Cursor = com.oracle.truffle.js.runtime.util.JSHashMap$Cursor of com.oracle.truffle.js.runtime.util.JSHashMap
  private final CursorImpl = com.oracle.truffle.js.runtime.util.JSHashMap$CursorImpl of com.oracle.truffle.js.runtime.util.JSHashMap
  private final Node = com.oracle.truffle.js.runtime.util.JSHashMap$Node of com.oracle.truffle.js.runtime.util.JSHashMap