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from sqlalchemy import Column, ForeignKey, Integer, MetaData, String, and_
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from sqlalchemy.ext.declarative import declarative_base, declared_attr
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from sqlalchemy.orm import relationship
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from openlp.core.lib.db import Manager, init_db, init_url
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from openlp.core.projectors.constants import PJLINK_DEFAULT_CODES
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Base = declarative_base(MetaData())