code: def is_valid_gradient(grad):
      if JAX_MODE:
          return grad.dtype != jax.float0
      return grad is not None
  
imports: import tensorflow.compat.v2
  from tensorflow.python.ops import array_ops
label_desc: Use image node_id 3 for calling a global function with example usage: is_valid_gradient(grad) and returns: unknown, unknown