https://www.graalvm.org/ 
public interface com.oracle.graal.python.runtime.AsyncHandler$AsyncAction
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.graal.python.runtime.AsyncHandler$AsyncAction
  super_class: java.lang.Object
{
  public abstract void execute(com.oracle.graal.python.runtime.PythonContext);
    descriptor: (Lcom/oracle/graal/python/runtime/PythonContext;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
         Name  Flags
      context  
}
SourceFile: "AsyncHandler.java"
NestHost: com.oracle.graal.python.runtime.AsyncHandler
InnerClasses:
  public abstract AsyncAction = com.oracle.graal.python.runtime.AsyncHandler$AsyncAction of com.oracle.graal.python.runtime.AsyncHandler