code: def dot_product(x: OnGrid, y: OnGrid, *, params=None):
      r"""Computes the dot product of two fields."""
      x_conj = compose(x)(jnp.conj)
      return jnp.sum((x_conj * y).on_grid)
  
imports: from jax import numpy
  from jaxdf.core import operator
  from jaxdf.discretization import OnGrid
  from .functions import compose
label_desc: Use image node_id 2 for calling a global function with example usage: dot_product(x, y) and returns: jnp