code: def dummy(x: Continuous, *, params=None):
      if params is None:
          params = {"k": 3.0}
      get_x = x.get_fun
  
      def get_fun(p__par, coords):
          p, params = p__par
          return get_x(p, coords) + params["k"]
  
      return x.update_fun_and_params([x.params, params], get_fun)
  
file_path: jaxdf/jaxdf/operators/dummy.py
imports: from jaxdf.core import operator
  from jaxdf.discretization import Continuous, Field, OnGrid
label_desc: Use image node_id 4 for calling a global function with example usage: dummy(x) and returns: x, unknown