-import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
-import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
-import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
-import org.opendaylight.yangtools.yang.parser.spi.IdentityNamespace;
-import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
-import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
-import org.opendaylight.yangtools.yang.parser.spi.meta.DerivedIdentitiesNamespace;
-import org.opendaylight.yangtools.yang.model.api.stmt.IdentityStatement;
-import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
-import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
-import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
-import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.BaseEffectiveStatementImpl;