https://www.graalvm.org/ 
public interface com.oracle.truffle.tools.chromeinspector.server.JSONMessageListener
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.tools.chromeinspector.server.JSONMessageListener
  super_class: java.lang.Object
{
  public abstract void onMessage(com.oracle.truffle.tools.utils.json.JSONObject);
    descriptor: (Lcom/oracle/truffle/tools/utils/json/JSONObject;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws com.oracle.truffle.api.interop.UnsupportedTypeException, com.oracle.truffle.api.interop.ArityException, com.oracle.truffle.api.interop.UnsupportedMessageException
    MethodParameters:
         Name  Flags
      message  
}
SourceFile: "JSONMessageListener.java"