code: def get_extra_lines(tup):
      ext_name, pyopencl_ver = tup
      if ext_name is not None:
          if ext_name.startswith("CL_"):
              # capital letters -> CL version, not extension
              yield ""
              yield "    Available with OpenCL %s." % (ext_name[3:])
              yield ""
  
          else:
              yield ""
              yield "    Available with the ``%s`` extension." % ext_name
              yield ""
  
      if pyopencl_ver is not None:
          yield ""
          yield "    .. versionadded:: %s" % pyopencl_ver
          yield ""
  
label_desc: Use image node_id 1 for calling a global function with example usage: get_extra_lines(tup) without return types