https://www.graalvm.org/ 
class com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$ImageExecutionTimeFactory implements java.util.function.Function<java.nio.file.Path, com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$PreInitializePath>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$ImageExecutionTimeFactory
  super_class: java.lang.Object
{
  final com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem this$1;
    descriptor: Lcom/oracle/truffle/polyglot/FileSystems$PreInitializeContextFileSystem;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private void <init>(com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem);
    descriptor: (Lcom/oracle/truffle/polyglot/FileSystems$PreInitializeContextFileSystem;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$ImageExecutionTimeFactory this
         0: .line 429
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$ImageExecutionTimeFactory.this$1:Lcom/oracle/truffle/polyglot/FileSystems$PreInitializeContextFileSystem;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$ImageExecutionTimeFactory this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/polyglot/FileSystems$PreInitializeContextFileSystem$ImageExecutionTimeFactory;
    MethodParameters:
        Name  Flags
      this$0  final

  public com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$PreInitializePath apply(java.nio.file.Path);
    descriptor: (Ljava/nio/file/Path;)Lcom/oracle/truffle/polyglot/FileSystems$PreInitializeContextFileSystem$PreInitializePath;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$ImageExecutionTimeFactory this
        start local 1 // java.nio.file.Path path
         0: .line 433
            new com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$PreInitializePath
            dup
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$ImageExecutionTimeFactory.this$1:Lcom/oracle/truffle/polyglot/FileSystems$PreInitializeContextFileSystem;
            aload 1 /* path */
            invokespecial com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$PreInitializePath.<init>:(Lcom/oracle/truffle/polyglot/FileSystems$PreInitializeContextFileSystem;Ljava/nio/file/Path;)V
            areturn
        end local 1 // java.nio.file.Path path
        end local 0 // com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$ImageExecutionTimeFactory this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/polyglot/FileSystems$PreInitializeContextFileSystem$ImageExecutionTimeFactory;
            0    1     1  path  Ljava/nio/file/Path;
    MethodParameters:
      Name  Flags
      path  

  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.nio.file.Path
            invokevirtual com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$ImageExecutionTimeFactory.apply:(Ljava/nio/file/Path;)Lcom/oracle/truffle/polyglot/FileSystems$PreInitializeContextFileSystem$PreInitializePath;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/function/Function<Ljava/nio/file/Path;Lcom/oracle/truffle/polyglot/FileSystems$PreInitializeContextFileSystem$PreInitializePath;>;
SourceFile: "FileSystems.java"
NestHost: com.oracle.truffle.polyglot.FileSystems
InnerClasses:
  final PreInitializeContextFileSystem = com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem of com.oracle.truffle.polyglot.FileSystems
  private ImageExecutionTimeFactory = com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$ImageExecutionTimeFactory of com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem
  private final PreInitializePath = com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem$PreInitializePath of com.oracle.truffle.polyglot.FileSystems$PreInitializeContextFileSystem