code: package it.unibz.inf.ontop.model.term.functionsymbol.db.impl;
  
  import com.google.common.collect.ImmutableList;
  import it.unibz.inf.ontop.model.term.ImmutableTerm;
  import it.unibz.inf.ontop.model.term.TermFactory;
  import it.unibz.inf.ontop.model.type.DBTermType;
  import it.unibz.inf.ontop.model.type.TermType;
  
  import java.util.function.Function;
  
  public class MockupDBIsNullOrNotFunctionSymbolImpl extends AbstractDBIsNullOrNotFunctionSymbol {
  
      protected MockupDBIsNullOrNotFunctionSymbolImpl(boolean isNull, DBTermType dbBooleanTermType, DBTermType rootDBTermType) {
          super(isNull, dbBooleanTermType, rootDBTermType);
      }
  
      @Override
      public String getNativeDBString(ImmutableList<? extends ImmutableTerm> terms,
                                      Function<ImmutableTerm, String> termConverter, TermFactory termFactory) {
          throw new UnsupportedOperationException("getNativeDBString is not supported by the mockup implementation");
      }
  }
  