code: def kernels_output_cli(self,
                             kernel,
                             kernel_opt=None,
                             path=None,
                             force=False,
                             quiet=False):
          
          kernel = kernel or kernel_opt
          self.kernels_output(kernel, path, force, quiet)
docs: client wrapper for kernels_output, with same arguments. Extra
              arguments are described below, and see kernels_output for others.
               Parameters
              ==========
              kernel_opt: option from client instead of kernel, if not defined