code: def yummy(x: OnGrid, *, params=None):
      r"""A dummy operator that is useful for debugging."""
      return params["k"] * x
  
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 7 for calling a global function with example usage: yummy(x) and returns: unknown