code: def _generate_launcher(self, constants, signature):
      # generate glue code
      src = """
          #define __EXTENSION_BACKEND__
          #include <Python.h>
          #include <stdio.h>
  
          static PyObject* launch_counter(PyObject* self, PyObject* args) {
          static int64_t launch_counter = 0;
          launch_counter += 1;
          return PyLong_FromLong(launch_counter);
          }
  
          static PyObject* launch(PyObject* self, PyObject* args) {
          if (PyErr_Occurred()) {
              return NULL;
          }
          launch_counter(self, args);
          // return None
          Py_INCREF(Py_None);
          return Py_None;
          }
  
          static PyMethodDef ModuleMethods[] = {
          {"launch", launch, METH_VARARGS, "Entry point for all kernels with this signature"},
          {"launch_counter", launch_counter, METH_VARARGS, "Entry point to get launch counter"},
          {NULL, NULL, 0, NULL} // sentinel
          };
  
          static struct PyModuleDef ModuleDef = {
          PyModuleDef_HEAD_INIT,
          \"__triton_launcher\",
          NULL, //documentation
          -1, //size
          ModuleMethods
          };
  
          PyMODINIT_FUNC PyInit___triton_launcher(void) {
          PyObject *m = PyModule_Create(&ModuleDef);
          if(m == NULL) {
              return NULL;
          }
          PyModule_AddFunctions(m, ModuleMethods);
          return m;
          }
          """
  
      return src
  
imports: import functools
  import hashlib
  import importlib
  import os
  import shutil
  import subprocess
  import sysconfig
  import tempfile
  from pathlib import Path
  import setuptools
  import torch
  import triton
  import triton.language
  from triton.common.backend import BaseBackend, compute_core_version_key, register_backend
  from triton.common.build import quiet
  from triton.compiler.make_launcher import make_so_cache_key
  from triton.runtime.cache import get_cache_manager
  from triton.runtime.driver import DriverBase
label_desc: Use image node_id 14 for calling the ExtensionBackend obj's underlying member method code with example usage: obj._generate_launcher(constants, signature) and returns: src