https://www.graalvm.org/ 
public interface com.oracle.graal.python.builtins.BoundBuiltinCallable<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.graal.python.builtins.BoundBuiltinCallable
  super_class: java.lang.Object
{
  public abstract T boundToObject(com.oracle.graal.python.builtins.PythonBuiltinClassType, com.oracle.graal.python.runtime.object.PythonObjectFactory);
    descriptor: (Lcom/oracle/graal/python/builtins/PythonBuiltinClassType;Lcom/oracle/graal/python/runtime/object/PythonObjectFactory;)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Lcom/oracle/graal/python/builtins/PythonBuiltinClassType;Lcom/oracle/graal/python/runtime/object/PythonObjectFactory;)TT;
    MethodParameters:
         Name  Flags
      binding  
      factory  
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "BoundBuiltinCallable.java"