https://www.graalvm.org/ 
class com.oracle.truffle.polyglot.PolyglotExceptionImpl$2 implements java.util.function.Function<java.lang.StackTraceElement, org.graalvm.polyglot.PolyglotException$StackFrame>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.polyglot.PolyglotExceptionImpl$2
  super_class: java.lang.Object
{
  private final org.graalvm.polyglot.impl.AbstractPolyglotImpl$APIAccess val$apiAccess;
    descriptor: Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$APIAccess;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

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

  void <init>(org.graalvm.polyglot.impl.AbstractPolyglotImpl$APIAccess, com.oracle.truffle.polyglot.PolyglotExceptionImpl);
    descriptor: (Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$APIAccess;Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.oracle.truffle.polyglot.PolyglotExceptionImpl$2 this
         0: .line 557
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$2.val$apiAccess:Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$APIAccess;
            aload 0 /* this */
            aload 2
            putfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$2.val$impl:Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.polyglot.PolyglotExceptionImpl$2 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl$2;
    MethodParameters:
               Name  Flags
      val$apiAccess  final
      val$impl       final

  public org.graalvm.polyglot.PolyglotException$StackFrame apply(java.lang.StackTraceElement);
    descriptor: (Ljava/lang/StackTraceElement;)Lorg/graalvm/polyglot/PolyglotException$StackFrame;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.oracle.truffle.polyglot.PolyglotExceptionImpl$2 this
        start local 1 // java.lang.StackTraceElement element
         0: .line 560
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$2.val$apiAccess:Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$APIAccess;
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$2.val$impl:Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl;
            getfield com.oracle.truffle.polyglot.PolyglotExceptionImpl.impl:Lorg/graalvm/polyglot/PolyglotException;
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.PolyglotExceptionImpl$2.val$impl:Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl;
            aload 1 /* element */
            invokestatic com.oracle.truffle.polyglot.PolyglotExceptionFrame.createHost:(Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl;Ljava/lang/StackTraceElement;)Lcom/oracle/truffle/polyglot/PolyglotExceptionFrame;
            invokevirtual org.graalvm.polyglot.impl.AbstractPolyglotImpl$APIAccess.newPolyglotStackTraceElement:(Lorg/graalvm/polyglot/PolyglotException;Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$AbstractStackFrameImpl;)Lorg/graalvm/polyglot/PolyglotException$StackFrame;
            areturn
        end local 1 // java.lang.StackTraceElement element
        end local 0 // com.oracle.truffle.polyglot.PolyglotExceptionImpl$2 this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lcom/oracle/truffle/polyglot/PolyglotExceptionImpl$2;
            0    1     1  element  Ljava/lang/StackTraceElement;
    MethodParameters:
         Name  Flags
      element  

  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 java.lang.StackTraceElement
            invokevirtual com.oracle.truffle.polyglot.PolyglotExceptionImpl$2.apply:(Ljava/lang/StackTraceElement;)Lorg/graalvm/polyglot/PolyglotException$StackFrame;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/function/Function<Ljava/lang/StackTraceElement;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$2
  public final StackFrame = org.graalvm.polyglot.PolyglotException$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