https://www.graalvm.org/ 
public final class com.oracle.truffle.js.nodes.control.LabelBreakException extends com.oracle.truffle.js.nodes.control.BreakException
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.js.nodes.control.LabelBreakException
  super_class: com.oracle.truffle.js.nodes.control.BreakException
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: -91013036379258890

  public void <init>(int);
    descriptor: (I)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.control.LabelBreakException this
        start local 1 // int id
         0: .line 48
            aload 0 /* this */
            iload 1 /* id */
            invokespecial com.oracle.truffle.js.nodes.control.BreakException.<init>:(I)V
         1: .line 49
            return
        end local 1 // int id
        end local 0 // com.oracle.truffle.js.nodes.control.LabelBreakException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/js/nodes/control/LabelBreakException;
            0    2     1    id  I
    MethodParameters:
      Name  Flags
      id    
}
SourceFile: "LabelBreakException.java"