code: def test_is_complex():
      def f(params, x):
          return params * jnp.sum(x)
  
      def g(params, x):
          return 1j * params * jnp.sum(x)
  
      params = jnp.ones((1,))
  
      domain = Domain((4,), dx=(0.1,))
      real_field = Continuous(params, domain, f)
      complex_field = Continuous(params, domain, g)
  
      assert real_field.is_complex == False
      assert complex_field.is_complex == True
  
imports: import numpy
  import pytest
  from jax import jit
  from jax import numpy
  from jax import random
  from jaxdf.discretization import Continuous
  from jaxdf.geometry import Domain
label_desc: Use image node_id 9 for calling a global function with example usage: test_is_complex() and returns: unknown, unknown