https://www.graalvm.org/ 
class org.graalvm.compiler.graph.NodeIdAccessor
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.graalvm.compiler.graph.NodeIdAccessor
  super_class: java.lang.Object
{
  final org.graalvm.compiler.graph.Graph graph;
    descriptor: Lorg/graalvm/compiler/graph/Graph;
    flags: (0x0010) ACC_FINAL

  final int epoch;
    descriptor: I
    flags: (0x0010) ACC_FINAL

  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 30
            ldc Lorg/graalvm/compiler/graph/NodeIdAccessor;
            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 org.graalvm.compiler.graph.NodeIdAccessor.$assertionsDisabled:Z
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>(org.graalvm.compiler.graph.Graph);
    descriptor: (Lorg/graalvm/compiler/graph/Graph;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.graalvm.compiler.graph.NodeIdAccessor this
        start local 1 // org.graalvm.compiler.graph.Graph graph
         0: .line 34
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 35
            aload 0 /* this */
            aload 1 /* graph */
            putfield org.graalvm.compiler.graph.NodeIdAccessor.graph:Lorg/graalvm/compiler/graph/Graph;
         2: .line 36
            aload 0 /* this */
            aload 1 /* graph */
            getfield org.graalvm.compiler.graph.Graph.compressions:I
            putfield org.graalvm.compiler.graph.NodeIdAccessor.epoch:I
         3: .line 37
            return
        end local 1 // org.graalvm.compiler.graph.Graph graph
        end local 0 // org.graalvm.compiler.graph.NodeIdAccessor this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    4     0   this  Lorg/graalvm/compiler/graph/NodeIdAccessor;
            0    4     1  graph  Lorg/graalvm/compiler/graph/Graph;
    MethodParameters:
       Name  Flags
      graph  

  org.graalvm.compiler.graph.Graph getGraph();
    descriptor: ()Lorg/graalvm/compiler/graph/Graph;
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.graalvm.compiler.graph.NodeIdAccessor this
         0: .line 40
            aload 0 /* this */
            getfield org.graalvm.compiler.graph.NodeIdAccessor.graph:Lorg/graalvm/compiler/graph/Graph;
            areturn
        end local 0 // org.graalvm.compiler.graph.NodeIdAccessor this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/compiler/graph/NodeIdAccessor;

  boolean verifyIdsAreStable();
    descriptor: ()Z
    flags: (0x0000) 
    Code:
      stack=8, locals=2, args_size=1
        start local 0 // org.graalvm.compiler.graph.NodeIdAccessor this
         0: .line 50
            aload 0 /* this */
            getfield org.graalvm.compiler.graph.NodeIdAccessor.graph:Lorg/graalvm/compiler/graph/Graph;
            getfield org.graalvm.compiler.graph.Graph.compressions:I
            aload 0 /* this */
            getfield org.graalvm.compiler.graph.NodeIdAccessor.epoch:I
            isub
            istore 1 /* compressions */
        start local 1 // int compressions
         1: .line 51
            iload 1 /* compressions */
            ifeq 5
         2: .line 52
            new org.graalvm.compiler.graph.VerificationError
            dup
            ldc "accessing node id in %s across %d graph compression%s"
            iconst_3
            anewarray java.lang.Object
            dup
            iconst_0
            aload 0 /* this */
            getfield org.graalvm.compiler.graph.NodeIdAccessor.graph:Lorg/graalvm/compiler/graph/Graph;
            aastore
            dup
            iconst_1
            iload 1 /* compressions */
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            aastore
            dup
            iconst_2
            iload 1 /* compressions */
            iconst_1
            if_icmpne 3
            ldc ""
            goto 4
      StackMap locals: org.graalvm.compiler.graph.NodeIdAccessor int
      StackMap stack: new 2 new 2 java.lang.String java.lang.Object[] java.lang.Object[] int
         3: ldc "s"
      StackMap locals: org.graalvm.compiler.graph.NodeIdAccessor int
      StackMap stack: new 2 new 2 java.lang.String java.lang.Object[] java.lang.Object[] int java.lang.String
         4: aastore
            invokespecial org.graalvm.compiler.graph.VerificationError.<init>:(Ljava/lang/String;[Ljava/lang/Object;)V
            athrow
         5: .line 54
      StackMap locals:
      StackMap stack:
            iconst_1
            ireturn
        end local 1 // int compressions
        end local 0 // org.graalvm.compiler.graph.NodeIdAccessor this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    6     0          this  Lorg/graalvm/compiler/graph/NodeIdAccessor;
            1    6     1  compressions  I

  int getNodeId(org.graalvm.compiler.graph.Node);
    descriptor: (Lorg/graalvm/compiler/graph/Node;)I
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.graalvm.compiler.graph.NodeIdAccessor this
        start local 1 // org.graalvm.compiler.graph.Node node
         0: .line 62
            getstatic org.graalvm.compiler.graph.NodeIdAccessor.$assertionsDisabled:Z
            ifne 1
            aload 0 /* this */
            invokevirtual org.graalvm.compiler.graph.NodeIdAccessor.verifyIdsAreStable:()Z
            ifne 1
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         1: .line 63
      StackMap locals:
      StackMap stack:
            aload 1 /* node */
            invokevirtual org.graalvm.compiler.graph.Node.id:()I
            ireturn
        end local 1 // org.graalvm.compiler.graph.Node node
        end local 0 // org.graalvm.compiler.graph.NodeIdAccessor this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/graalvm/compiler/graph/NodeIdAccessor;
            0    2     1  node  Lorg/graalvm/compiler/graph/Node;
    MethodParameters:
      Name  Flags
      node  
}
SourceFile: "NodeIdAccessor.java"