code: def register_acd_resource_resolver(f):
      """Register a function for resolving resources touched by an op.
  
      `f` is called for every Operation added in the ACD context with the op's
      original resource reads and writes. `f` is expected to update the sets of
      resource reads and writes in-place and return True if it updated either of the
      sets, False otherwise.
  
      Example:
      @register_acd_resource_resolver
      def identity_resolver(op, resource_reads, resource_writes):
        # op: The `Operation` being processed by ACD currently.
        # resource_reads: An `ObjectIdentitySet` of read-only resources.
        # resource_writes: An `ObjectIdentitySet` of read-write resources.
        def update(resource_inputs):
          to_remove = []
          to_add = []
          for resource in resource_inputs:
            if resource.op.type == "Identity":
              to_remove.append(resource)
              to_add.extend(resource.op.inputs)
          for t in to_remove:
            resource_inputs.discard(t)
          resource_inputs.update(to_add)
          return to_add or to_remove
        return update(resource_reads) or update(resource_writes)
  
      Args:
        f: Python function with signature
        (Operation, ObjectIdentitySet, ObjectIdentitySet) -> bool
  
      Returns:
        The function `f` after adding it to the registry.
      """
      _acd_resource_resolvers_registry.register(f)
      return f
  
imports: import collections
  import enum
  from tensorflow.core.framework import attr_value_pb2
  from tensorflow.python.eager import context
  from tensorflow.python.framework import auto_control_deps_utils
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import indexed_slices
  from tensorflow.python.framework import op_def_registry
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import registry
  from tensorflow.python.framework import sparse_tensor
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import control_flow_ops
  from tensorflow.python.ops import control_flow_util
  from tensorflow.python.ops import tensor_array_ops
  from tensorflow.python.util import nest
  from tensorflow.python.util import object_identity
  from tensorflow.python.util import tf_decorator
label_desc: Use image node_id 3 for calling a global function with example usage: register_acd_resource_resolver(f) and returns: f