code: def test_explain_with_no_target_implementation():
      from mlflow_test_plugin import fake_deployment_plugin
  
      mock_error = MlflowException("MOCK ERROR")
      target_client = deployments.get_deploy_client(f_target)
      plugin = fake_deployment_plugin.PluginDeploymentClient
      with mock.patch.object(
          plugin, "explain", return_value=mock_error
      ) as mock_explain:
          res = target_client.explain(f_target, "test")
          assert type(res) == MlflowException
          mock_explain.assert_called_once()
  
imports: import os
  from unittest import mock
  import pytest
  from mlflow import deployments
  from mlflow.deployments.plugin_manager import DeploymentPlugins
  from mlflow.exceptions import MlflowException
label_desc: Use image node_id 15 for calling a global function with example usage: test_explain_with_no_target_implementation() without return types