https://www.graalvm.org/ 
class com.oracle.truffle.polyglot.PolyglotExceptionImpl$3 implements java.util.function.Function<com.oracle.truffle.api.TruffleStackTraceElement, org.graalvm.polyglot.PolyglotException$StackFrame>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.polyglot.PolyglotExceptionImpl$3
  super_class: java.lang.Object
{
  private boolean firstGuestFrame;
    descriptor: Z
    flags: (0x0002) ACC_PRIVATE

  private final com.oracle.truffle.polyglot.PolyglotExceptionImpl val$impl;
    descriptor: Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  private final org.graalvm.polyglot.impl.AbstractPolyglotImpl$APIAccess val$apiAccess;
    descriptor: Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$APIAccess;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.polyglot.PolyglotExceptionImpl, org.graalvm.polyglot.impl.AbstractPolyglotImpl$APIAccess);
    descriptor: (Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl;Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$APIAccess;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.oracle.truffle.polyglot.PolyglotExceptionImpl$3 this
         0: .line 562
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$3.val$impl:Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl;
            aload 0 /* this */
            aload 2
            putfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$3.val$apiAccess:Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$APIAccess;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 564
            aload 0 /* this */
            iconst_1
            putfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$3.firstGuestFrame:Z
         2: .line 562
            return
        end local 0 // com.oracle.truffle.polyglot.PolyglotExceptionImpl$3 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl$3;
    MethodParameters:
               Name  Flags
      val$impl       final
      val$apiAccess  final

  public org.graalvm.polyglot.PolyglotException$StackFrame apply(com.oracle.truffle.api.TruffleStackTraceElement);
    descriptor: (Lcom/oracle/truffle/api/TruffleStackTraceElement;)Lorg/graalvm/polyglot/PolyglotException$StackFrame;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=4, args_size=2
        start local 0 // com.oracle.truffle.polyglot.PolyglotExceptionImpl$3 this
        start local 1 // com.oracle.truffle.api.TruffleStackTraceElement guestFrame
         0: .line 568
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$3.firstGuestFrame:Z
            istore 2 /* first */
        start local 2 // boolean first
         1: .line 569
            aload 0 /* this */
            iconst_0
            putfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$3.firstGuestFrame:Z
         2: .line 570
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$3.val$impl:Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl;
            aload 1 /* guestFrame */
            iload 2 /* first */
            invokestatic com.oracle.truffle.polyglot.PolyglotExceptionFrame.createGuest:(Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl;Lcom/oracle/truffle/api/TruffleStackTraceElement;Z)Lcom/oracle/truffle/polyglot/PolyglotExceptionFrame;
            astore 3 /* guest */
        start local 3 // com.oracle.truffle.polyglot.PolyglotExceptionFrame guest
         3: .line 571
            aload 3 /* guest */
            ifnull 5
         4: .line 572
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$3.val$apiAccess:Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$APIAccess;
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$3.val$impl:Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl;
            getfield com.oracle.truffle.polyglot.PolyglotExceptionImpl.impl:Lorg/graalvm/polyglot/PolyglotException;
            aload 3 /* guest */
            invokevirtual org.graalvm.polyglot.impl.AbstractPolyglotImpl$APIAccess.newPolyglotStackTraceElement:(Lorg/graalvm/polyglot/PolyglotException;Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$AbstractStackFrameImpl;)Lorg/graalvm/polyglot/PolyglotException$StackFrame;
            areturn
         5: .line 574
      StackMap locals: int com.oracle.truffle.polyglot.PolyglotExceptionFrame
      StackMap stack:
            aconst_null
            areturn
        end local 3 // com.oracle.truffle.polyglot.PolyglotExceptionFrame guest
        end local 2 // boolean first
        end local 1 // com.oracle.truffle.api.TruffleStackTraceElement guestFrame
        end local 0 // com.oracle.truffle.polyglot.PolyglotExceptionImpl$3 this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    6     0        this  Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl$3;
            0    6     1  guestFrame  Lcom/oracle/truffle/api/TruffleStackTraceElement;
            1    6     2       first  Z
            3    6     3       guest  Lcom/oracle/truffle/polyglot/PolyglotExceptionFrame;
    MethodParameters:
            Name  Flags
      guestFrame  

  public java.lang.Object apply(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast com.oracle.truffle.api.TruffleStackTraceElement
            invokevirtual com.oracle.truffle.polyglot.PolyglotExceptionImpl$3.apply:(Lcom/oracle/truffle/api/TruffleStackTraceElement;)Lorg/graalvm/polyglot/PolyglotException$StackFrame;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/function/Function<Lcom/oracle/truffle/api/TruffleStackTraceElement;Lorg/graalvm/polyglot/PolyglotException$StackFrame;>;
SourceFile: "PolyglotExceptionImpl.java"
EnclosingMethod: com.oracle.truffle.polyglot.PolyglotExceptionImpl.createStackFrameIterator:(Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl;)Ljava/util/Iterator;
NestHost: com.oracle.truffle.polyglot.PolyglotExceptionImpl
InnerClasses:
  com.oracle.truffle.polyglot.PolyglotExceptionImpl$3
  public final StackFrame = org.graalvm.polyglot.PolyglotException$StackFrame of org.graalvm.polyglot.PolyglotException
  public abstract APIAccess = org.graalvm.polyglot.impl.AbstractPolyglotImpl$APIAccess of org.graalvm.polyglot.impl.AbstractPolyglotImpl
  public abstract AbstractStackFrameImpl = org.graalvm.polyglot.impl.AbstractPolyglotImpl$AbstractStackFrameImpl of org.graalvm.polyglot.impl.AbstractPolyglotImpl