import org.simantics.graph.compiler.GraphCompiler;
import org.simantics.graph.compiler.GraphCompilerPreferences;
import org.simantics.graph.compiler.ValidationMode;
+import org.simantics.graph.compiler.internal.ltk.FileSource;
+import org.simantics.graph.compiler.internal.ltk.ISource;
+import org.simantics.graph.compiler.internal.ltk.Problem;
import org.simantics.graph.representation.Extensions;
import org.simantics.graph.representation.TransferableGraph1;
import org.simantics.graph.representation.TransferableGraphFileReader;
-import org.simantics.ltk.FileSource;
-import org.simantics.ltk.ISource;
-import org.simantics.ltk.Problem;
import org.simantics.scl.reflection.OntologyVersions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;