https://www.graalvm.org/ 
public interface com.oracle.truffle.js.shell.ConsoleHandler
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.js.shell.ConsoleHandler
  super_class: java.lang.Object
{
  public abstract java.lang.String readLine();
    descriptor: ()Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.io.IOException
}
SourceFile: "ConsoleHandler.java"