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. 
interface org.graalvm.options.OptionType$Converter<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.graalvm.options.OptionType$Converter
  super_class: java.lang.Object
{
  public abstract T convert(T, java.lang.String, java.lang.String);
    descriptor: (Ljava/lang/Object;Ljava/lang/String;Ljava/lang/String;)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TT;Ljava/lang/String;Ljava/lang/String;)TT;
    MethodParameters:
               Name  Flags
      previousValue  
      key            
      value          
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "OptionType.java"
NestHost: org.graalvm.options.OptionType
InnerClasses:
  private abstract Converter = org.graalvm.options.OptionType$Converter of org.graalvm.options.OptionType
    RuntimeVisibleAnnotations: 
      java.lang.FunctionalInterface()