https://github.com/oracle/graal: GraalVM is an ecosystem for compiling and running applications written in multiple languages. GraalVM removes the isolation between programming languages and enables interoperability in a shared runtime. 
class org.graalvm.options.OptionType$8 implements java.util.function.Function<java.lang.String, java.lang.String>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.graalvm.options.OptionType$8
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.graalvm.options.OptionType$8 this
         0: .line 255
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.graalvm.options.OptionType$8 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/options/OptionType$8;

  public java.lang.String apply(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // org.graalvm.options.OptionType$8 this
        start local 1 // java.lang.String t
         0: .line 257
            aload 1 /* t */
            areturn
        end local 1 // java.lang.String t
        end local 0 // org.graalvm.options.OptionType$8 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/options/OptionType$8;
            0    1     1     t  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      t     

  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.String
            invokevirtual org.graalvm.options.OptionType$8.apply:(Ljava/lang/String;)Ljava/lang/String;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/function/Function<Ljava/lang/String;Ljava/lang/String;>;
SourceFile: "OptionType.java"
EnclosingMethod: org.graalvm.options.OptionType
NestHost: org.graalvm.options.OptionType
InnerClasses:
  org.graalvm.options.OptionType$8