https://www.graalvm.org/ 
public final class com.oracle.truffle.js.nodes.control.VoidBlockNode extends com.oracle.truffle.js.nodes.control.AbstractBlockNode implements com.oracle.truffle.js.nodes.control.SequenceNode
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.js.nodes.control.VoidBlockNode
  super_class: com.oracle.truffle.js.nodes.control.AbstractBlockNode
{
  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 50
            ldc Lcom/oracle/truffle/js/nodes/control/VoidBlockNode;
            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.nodes.control.VoidBlockNode.$assertionsDisabled:Z
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>(com.oracle.truffle.js.nodes.JavaScriptNode[]);
    descriptor: ([Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.control.VoidBlockNode this
        start local 1 // com.oracle.truffle.js.nodes.JavaScriptNode[] statements
         0: .line 52
            aload 0 /* this */
            aload 1 /* statements */
            invokespecial com.oracle.truffle.js.nodes.control.AbstractBlockNode.<init>:([Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
         1: .line 53
            return
        end local 1 // com.oracle.truffle.js.nodes.JavaScriptNode[] statements
        end local 0 // com.oracle.truffle.js.nodes.control.VoidBlockNode this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    2     0        this  Lcom/oracle/truffle/js/nodes/control/VoidBlockNode;
            0    2     1  statements  [Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
            Name  Flags
      statements  

  public static com.oracle.truffle.js.nodes.JavaScriptNode createVoidBlock(com.oracle.truffle.js.nodes.JavaScriptNode[]);
    descriptor: ([Lcom/oracle/truffle/js/nodes/JavaScriptNode;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    flags: (0x0089) ACC_PUBLIC, ACC_STATIC, ACC_VARARGS
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.nodes.JavaScriptNode[] statements
         0: .line 56
            aload 0 /* statements */
            iconst_0
            invokestatic com.oracle.truffle.js.nodes.control.VoidBlockNode.filterStatements:([Lcom/oracle/truffle/js/nodes/JavaScriptNode;Z)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            areturn
        end local 0 // com.oracle.truffle.js.nodes.JavaScriptNode[] statements
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    1     0  statements  [Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
            Name  Flags
      statements  

  public java.lang.Object execute(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.control.VoidBlockNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 61
            aload 0 /* this */
            aload 1 /* frame */
            invokevirtual com.oracle.truffle.js.nodes.control.VoidBlockNode.executeVoid:(Lcom/oracle/truffle/api/frame/VirtualFrame;)V
         1: .line 62
            getstatic com.oracle.truffle.js.nodes.control.VoidBlockNode.EMPTY:Ljava/lang/Object;
            areturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.nodes.control.VoidBlockNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lcom/oracle/truffle/js/nodes/control/VoidBlockNode;
            0    2     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
    MethodParameters:
       Name  Flags
      frame  

  protected com.oracle.truffle.js.nodes.JavaScriptNode copyUninitialized(java.util.Set<java.lang.Class<? extends com.oracle.truffle.api.instrumentation.Tag>>);
    descriptor: (Ljava/util/Set;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.control.VoidBlockNode this
        start local 1 // java.util.Set materializedTags
         0: .line 67
            new com.oracle.truffle.js.nodes.control.VoidBlockNode
            dup
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.nodes.control.VoidBlockNode.getStatements:()[Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            aload 1 /* materializedTags */
            invokestatic com.oracle.truffle.js.nodes.control.VoidBlockNode.cloneUninitialized:([Lcom/oracle/truffle/js/nodes/JavaScriptNode;Ljava/util/Set;)[Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            invokespecial com.oracle.truffle.js.nodes.control.VoidBlockNode.<init>:([Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
            areturn
        end local 1 // java.util.Set materializedTags
        end local 0 // com.oracle.truffle.js.nodes.control.VoidBlockNode this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0    1     0              this  Lcom/oracle/truffle/js/nodes/control/VoidBlockNode;
            0    1     1  materializedTags  Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;
    Signature: (Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
                  Name  Flags
      materializedTags  

  public boolean isResultAlwaysOfType(java.lang.Class<?>);
    descriptor: (Ljava/lang/Class;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.control.VoidBlockNode this
        start local 1 // java.lang.Class clazz
         0: .line 72
            getstatic com.oracle.truffle.js.nodes.control.VoidBlockNode.$assertionsDisabled:Z
            ifne 1
            getstatic com.oracle.truffle.js.nodes.control.VoidBlockNode.EMPTY:Ljava/lang/Object;
            getstatic com.oracle.truffle.js.runtime.objects.Undefined.instance:Lcom/oracle/truffle/js/runtime/objects/JSDynamicObject;
            if_acmpeq 1
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         1: .line 73
      StackMap locals:
      StackMap stack:
            aload 1 /* clazz */
            ldc Lcom/oracle/truffle/js/runtime/objects/Undefined;
            if_acmpne 2
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         2: iconst_0
            ireturn
        end local 1 // java.lang.Class clazz
        end local 0 // com.oracle.truffle.js.nodes.control.VoidBlockNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lcom/oracle/truffle/js/nodes/control/VoidBlockNode;
            0    3     1  clazz  Ljava/lang/Class<*>;
    Signature: (Ljava/lang/Class<*>;)Z
    MethodParameters:
       Name  Flags
      clazz  
}
SourceFile: "VoidBlockNode.java"