@classmethod<EOL><INDENT>def _init_db(cls):<DEDENT>
<EOL>import fonduer.candidates.models  <EOL>import fonduer.features.models  <EOL>import fonduer.learning.models  <EOL>import fonduer.parser.models  <EOL>import fonduer.supervision.models  <EOL>import fonduer.utils.models  <EOL>logger.info("<STR_LIT>")<EOL>Meta.Base.metadata.create_all(Meta.engine)<EOL>
Initialize the storage schema.

        This call must be performed after all classes that extend
        Base are declared to ensure the storage schema is initialized.