|  | @@ -5,7 +5,6 @@ from mock import Mock, patch
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				|  |  |  from celery import uuid
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				|  |  |  from celery import signals
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				|  |  |  from celery import states
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				|  |  | -from celery.app.task import Task as BaseTask
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				|  |  |  from celery.exceptions import RetryTaskError, Ignore
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				|  |  |  from celery.task.trace import (
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				|  |  |      TraceInfo,
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				|  | @@ -14,7 +13,7 @@ from celery.task.trace import (
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				|  |  |      setup_worker_optimizations,
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				|  |  |      reset_worker_optimizations,
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				|  |  |  )
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				|  |  | -from celery.tests.utils import AppCase, Mock
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				|  |  | +from celery.tests.utils import AppCase
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				|  |  |  
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				|  |  |  
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				|  |  |  def trace(task, args=(), kwargs={}, propagate=False, **opts):
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