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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def injectables(**kwargs):
 """ Temporarily add injectables to the pipeline environment. Takes only keyword arguments. Injectables will be returned to their original state when the context manager exits. """

    global _INJECTABLES

    original = _INJECTABLES.copy()
    _INJECTABLES.update(kwargs)
    yield
    _INJECTABLES = original