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You may","# obtain a copy of this license in the LICENSE.txt file in the root directory","# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.","#","# Any modifications or derivative works of this code must retain this","# copyright notice, and modified files need to carry a notice indicating","# that they have been altered from the originals.","","\"\"\"Base class for a provider.\"\"\"","","from abc import ABC, abstractmethod","","from qiskit.providers.exceptions import QiskitBackendNotFoundError","","","class Provider:"," \"\"\"Base common type for all versioned Provider abstract classes.",""," Note this class should not be inherited from directly, it is intended"," to be used for type checking. 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